.284 Shehane, anyone?

tobnpr · April 22, 2013, 09:31 PM

I've fallen in lust with the 7mm for long-range...

Great performance with the 162 Amax in my 7-08 at 1000, and want some more boiler room to push that incredible boolit- and heavier 180's. 2900+ with the 180's...

The .284 Shehane seems to be "the unbeatable" 1000 yard caliber compromise of performance and barrel life.

Search here didn't turn up anything.

Anyone own this bad boy?

And if anyone has Quickload and time on their hands, how fast can that cartridge with RL-17 push the 162?

trg42wraglefragle · April 22, 2013, 10:38 PM

I have a mate who has built a 284 Winchester and managed to get 3100fps with Reloader 17 and the 162 Amax, has a 28" trueflight barrel.

Don't know what the difference between the Shehane and standard Winchester is, but if its any harder to reload than his 284 Win then I wouldn't bother as the amount of stuffing around hes had to do to reload for it is more than I would've liked, on paper its better than my 223 but if you cant load any ammo for it in reality its not that good

Hope this info is of some use.

Oh and the 3100fps was quite easy to obtain, I believe in load development he did have a few faster loads but was very happy with 3100.

Scorch · April 23, 2013, 02:17 AM

The 284 Shehane is a moderately blown out 284, with 3% extra capacity over the parent case. Not enough gain to be worth the trouble, IMO. If you want more than a standard 284 Win in a short-fat, move up to a 7mm WSM.

tobnpr · April 23, 2013, 09:56 AM

According to this, it's 3.3 grains over the .284...which is a 5% gain in capacity- not insignificant- if I've done my figgerin' correctly.

http://bulletin.accurateshooter.com/tag/7mm/

The .300 WSM case is 79 grains capacity (H2O), and the Shehane is just under 70. Less powder burn, longer throat life? Real-world performance difference?

No aversion to a LA...

162 grains, 0.625 BC at 3100 fps...now that's what I'm talking about.

Jim Watson · April 23, 2013, 10:08 AM

There is one gunzine writer whose rule of thumb is that the increase in velocity is 1/4 the increase in case capacity.
I somewhat suspect that the Shehane is being loaded hotter than the Winchester, and its blown out shape just shows fewer "pressure signs" in the manner of the AIs.

old roper · April 23, 2013, 10:54 AM

tobnpr, you can get on 6br site forum and ask actual shooters that are using the 284 Shehane what they think of it.

There is little bit of conflicting information if you read the loading data for this 284 F-Class rifle

http://www.6mmbr.com/gunweek088.html

tobnpr · April 23, 2013, 08:47 PM

Thanks for the input guys.
Just happened to pick the American Rifleman that came a few days ago, and whaddyaknow... big article on the 7mm long range calibers, specifically the 7 STW.

I know that the 180's seem to rule here, but I keep thinking about the possibilities of pushing that 162 Amax...the 180 Berger has a .659, and the Amax a .625...not far off, and 18 grains lighter.

reynolds357 · April 23, 2013, 10:24 PM

You dont want to shoot 1000 yard with an STW unless you have very deep pockets. The 7WSM and .284 Winchester are both great 1k rifles. I retired my WSM for the .284 Win.

nicknitro71 · April 24, 2013, 08:00 AM

I'd go with the .280 AI, brass is more readily available (280 r and 30-06) and it's just 100-150 f/s slower than a 7 mag.

garryc · April 24, 2013, 10:25 AM

The 284 seems to be about the upper edge when it comes to barrel life. As an example, when it's necked down to .264 barrel life drops.

That being said, I shoot a .284 Winchester that I had built on a M70 action. I shoot Sierra 168 Grain match bullets and H4831sc. That load stays comfortably enough above super sonic that I don't have to worry about atmospheric conditions to 1000 yards.

If I wanted to push that bullet faster I would go to the 280 AI. I would, like I do with the 284, have the neck cut a bit small so I can turn the case necks. Even release from the case neck is very important IMHO because it it does not release evenly then it can introduce a bit of yaw on the bullet before it is fully engaged in the rifling.

tobnpr · April 24, 2013, 12:23 PM

While there's always the "cool" factor to the wildcats, it does seem that the .284 is a solid enough performer in it's own right, without the added work on brass and reduced barrel life.

I don't shoot competitively, and it seems that it's mostly that arena utilizing the "souped-up" sevens...and while that small amount of extra velocity can make the difference in competition, I'm not at that level- plus, I can use all the practice I can get doping the wind...not to mention a little better barrel life.

4D is selling Savage pre-fits in whatever flavor they have reamers for...
They have a .284 "match"- would that just indicate a tighter chamber?
They have two AI versions of the .280-Nosler, and Traditional. Difference?

Won't be running factory ammo, so being able to chamber same isn't a concern.

reynolds357 · April 24, 2013, 10:10 PM

tobnpr, that extra velocity is not making a difference in competition. Right now the slower velocity cartridges, ie .284 Winchester are winning.

reynolds357 · April 24, 2013, 10:12 PM

Nicknitro, there is a laundry list of reasons of why the .280AI is far less than ideal for 1000 Yd competition.

old roper · April 25, 2013, 07:13 AM

Here is interesting article on 7mm from F-Class shooters on the BR site

http://benchrest.com/archive/index.php/t-73530.html?

The F-Class World Championship held In Raton this coming Aug it's interesting the US F-CLASS Open Team is shooting 7mags with 180gr bullets yardage is 800,900 and 1,000 yds.

http://usfclass.com/home.aspx

Always interesting see what actually been shot. I'm out of match shooting but build me a pretty nice 284 and 280AI for hunting. I can close to having the Shehane build instead of the 280AI but since I did the 284 on a long action opt for the 280AI.

tobnpr · April 25, 2013, 12:39 PM

Interesting...
It says they're running 7mm magnums...all the same chambering, or does each shooter have the flexibility to select their own? Quite a few 7mm magnums...

Sorry 'bout the stupid question, don't know how the "team" operates.

I also noticed that they all the rifles are laminate stocks- I assume traditionally bedded receivers?

There doesn't seem to be a restriction in Open against chassis systems, which are all the "rage" these days- even for precision shooting.

Is there an inherent disadvantage to accuracy with a chassis system that I'm not aware of- or a restriction to their use that I didn't see in the rules?

old roper · April 25, 2013, 02:56 PM

tobnpr, I would assume entire team is shooting 7mag in the open vs what they might use Palma team since that is restricted certain caliber.

I think those rifles are pretty tricked out just about everything done to them and be within weight limit allowed and looking at the Sponsors list I'm sure they got help from them.

F-Open

Caliber limit of .35 and under.
Rifle weight of 10 kgs (approx. 22 lbs.).
Adjustable front rest allowed.
Rear bag allowed.
Rail guns not allowed.
3" wide forend.
Rifle must be shouldered when fired.
Tables are prohibited.

At 22lbs or close to it 7amg wouldn't be too hard to handle.

TimW77 · April 25, 2013, 06:47 PM

"There is one gunzine writer whose rule of thumb is that the increase in velocity is 1/4 the increase in case capacity."

Sorry but he didn't come up with that "rule of thumb".

It's a well known "law of physics"!

T.

tobnpr · April 26, 2013, 10:18 AM

How could that be?
A heavier projectile is going to realize proportionately less increase in velocity, than a lighter one, for any given increase in charge (?).

April 22, 2013, 09:31 PM	#1
tobnpr Senior Member Join Date: August 1, 2010 Location: Tampa Bay Posts: 4,556	.284 Shehane, anyone? I've fallen in lust with the 7mm for long-range... Great performance with the 162 Amax in my 7-08 at 1000, and want some more boiler room to push that incredible boolit- and heavier 180's. 2900+ with the 180's... The .284 Shehane seems to be "the unbeatable" 1000 yard caliber compromise of performance and barrel life. Search here didn't turn up anything. Anyone own this bad boy? And if anyone has Quickload and time on their hands, how fast can that cartridge with RL-17 push the 162?

April 23, 2013, 02:17 AM	#3
Scorch Senior Member Join Date: February 13, 2006 Location: Washington state Posts: 15,249	The 284 Shehane is a moderately blown out 284, with 3% extra capacity over the parent case. Not enough gain to be worth the trouble, IMO. If you want more than a standard 284 Win in a short-fat, move up to a 7mm WSM. __________________ Never try to educate someone who resists knowledge at all costs. But what do I know? Summit Arms Services

April 23, 2013, 10:54 AM	#6
old roper Senior Member Join Date: June 11, 2007 Posts: 2,164	tobnpr, you can get on 6br site forum and ask actual shooters that are using the 284 Shehane what they think of it. There is little bit of conflicting information if you read the loading data for this 284 F-Class rifle http://www.6mmbr.com/gunweek088.html __________________ Semper Fi Vietnam 1965 VFW Life member NRA Life Member

April 24, 2013, 10:25 AM	#10
garryc Senior Member Join Date: November 12, 2005 Posts: 2,536	The 284 seems to be about the upper edge when it comes to barrel life. As an example, when it's necked down to .264 barrel life drops. That being said, I shoot a .284 Winchester that I had built on a M70 action. I shoot Sierra 168 Grain match bullets and H4831sc. That load stays comfortably enough above super sonic that I don't have to worry about atmospheric conditions to 1000 yards. If I wanted to push that bullet faster I would go to the 280 AI. I would, like I do with the 284, have the neck cut a bit small so I can turn the case necks. Even release from the case neck is very important IMHO because it it does not release evenly then it can introduce a bit of yaw on the bullet before it is fully engaged in the rifling. Last edited by garryc; April 24, 2013 at 10:30 AM.

April 25, 2013, 07:13 AM	#14
old roper Senior Member Join Date: June 11, 2007 Posts: 2,164	Here is interesting article on 7mm from F-Class shooters on the BR site http://benchrest.com/archive/index.php/t-73530.html? The F-Class World Championship held In Raton this coming Aug it's interesting the US F-CLASS Open Team is shooting 7mags with 180gr bullets yardage is 800,900 and 1,000 yds. http://usfclass.com/home.aspx Always interesting see what actually been shot. I'm out of match shooting but build me a pretty nice 284 and 280AI for hunting. I can close to having the Shehane build instead of the 280AI but since I did the 284 on a long action opt for the 280AI. __________________ Semper Fi Vietnam 1965 VFW Life member NRA Life Member

April 22, 2013, 10:38 PM	#2
trg42wraglefragle Senior Member Join Date: April 21, 2008 Location: new zealand Posts: 856	I have a mate who has built a 284 Winchester and managed to get 3100fps with Reloader 17 and the 162 Amax, has a 28" trueflight barrel. Don't know what the difference between the Shehane and standard Winchester is, but if its any harder to reload than his 284 Win then I wouldn't bother as the amount of stuffing around hes had to do to reload for it is more than I would've liked, on paper its better than my 223 but if you cant load any ammo for it in reality its not that good Hope this info is of some use. Oh and the 3100fps was quite easy to obtain, I believe in load development he did have a few faster loads but was very happy with 3100.

April 23, 2013, 09:56 AM	#4
tobnpr Senior Member Join Date: August 1, 2010 Location: Tampa Bay Posts: 4,556	According to this, it's 3.3 grains over the .284...which is a 5% gain in capacity- not insignificant- if I've done my figgerin' correctly. http://bulletin.accurateshooter.com/tag/7mm/ The .300 WSM case is 79 grains capacity (H2O), and the Shehane is just under 70. Less powder burn, longer throat life? Real-world performance difference? No aversion to a LA... 162 grains, 0.625 BC at 3100 fps...now that's what I'm talking about.

April 23, 2013, 10:08 AM	#5
Jim Watson Senior Member Join Date: October 25, 2001 Location: Alabama Posts: 19,159	There is one gunzine writer whose rule of thumb is that the increase in velocity is 1/4 the increase in case capacity. I somewhat suspect that the Shehane is being loaded hotter than the Winchester, and its blown out shape just shows fewer "pressure signs" in the manner of the AIs.

April 23, 2013, 08:47 PM	#7
tobnpr Senior Member Join Date: August 1, 2010 Location: Tampa Bay Posts: 4,556	Thanks for the input guys. Just happened to pick the American Rifleman that came a few days ago, and whaddyaknow... big article on the 7mm long range calibers, specifically the 7 STW. I know that the 180's seem to rule here, but I keep thinking about the possibilities of pushing that 162 Amax...the 180 Berger has a .659, and the Amax a .625...not far off, and 18 grains lighter.

April 23, 2013, 10:24 PM	#8
reynolds357 Senior Member Join Date: December 10, 2012 Posts: 6,187	You dont want to shoot 1000 yard with an STW unless you have very deep pockets. The 7WSM and .284 Winchester are both great 1k rifles. I retired my WSM for the .284 Win.

April 24, 2013, 08:00 AM	#9
nicknitro71 Senior Member Join Date: February 5, 2008 Location: DeLand, FL Posts: 110	I'd go with the .280 AI, brass is more readily available (280 r and 30-06) and it's just 100-150 f/s slower than a 7 mag.

April 24, 2013, 12:23 PM	#11
tobnpr Senior Member Join Date: August 1, 2010 Location: Tampa Bay Posts: 4,556	While there's always the "cool" factor to the wildcats, it does seem that the .284 is a solid enough performer in it's own right, without the added work on brass and reduced barrel life. I don't shoot competitively, and it seems that it's mostly that arena utilizing the "souped-up" sevens...and while that small amount of extra velocity can make the difference in competition, I'm not at that level- plus, I can use all the practice I can get doping the wind...not to mention a little better barrel life. 4D is selling Savage pre-fits in whatever flavor they have reamers for... They have a .284 "match"- would that just indicate a tighter chamber? They have two AI versions of the .280-Nosler, and Traditional. Difference? Won't be running factory ammo, so being able to chamber same isn't a concern.

April 24, 2013, 10:10 PM	#12
reynolds357 Senior Member Join Date: December 10, 2012 Posts: 6,187	tobnpr, that extra velocity is not making a difference in competition. Right now the slower velocity cartridges, ie .284 Winchester are winning.

April 24, 2013, 10:12 PM	#13
reynolds357 Senior Member Join Date: December 10, 2012 Posts: 6,187	Nicknitro, there is a laundry list of reasons of why the .280AI is far less than ideal for 1000 Yd competition.

April 25, 2013, 12:39 PM	#15
tobnpr Senior Member Join Date: August 1, 2010 Location: Tampa Bay Posts: 4,556	Interesting... It says they're running 7mm magnums...all the same chambering, or does each shooter have the flexibility to select their own? Quite a few 7mm magnums... Sorry 'bout the stupid question, don't know how the "team" operates. I also noticed that they all the rifles are laminate stocks- I assume traditionally bedded receivers? There doesn't seem to be a restriction in Open against chassis systems, which are all the "rage" these days- even for precision shooting. Is there an inherent disadvantage to accuracy with a chassis system that I'm not aware of- or a restriction to their use that I didn't see in the rules?

April 25, 2013, 02:56 PM	#16
old roper Senior Member Join Date: June 11, 2007 Posts: 2,164	tobnpr, I would assume entire team is shooting 7mag in the open vs what they might use Palma team since that is restricted certain caliber. I think those rifles are pretty tricked out just about everything done to them and be within weight limit allowed and looking at the Sponsors list I'm sure they got help from them. F-Open Caliber limit of .35 and under. Rifle weight of 10 kgs (approx. 22 lbs.). Adjustable front rest allowed. Rear bag allowed. Rail guns not allowed. 3" wide forend. Rifle must be shouldered when fired. Tables are prohibited. At 22lbs or close to it 7amg wouldn't be too hard to handle. __________________ Semper Fi Vietnam 1965 VFW Life member NRA Life Member

April 25, 2013, 06:47 PM	#17
TimW77 Senior Member Join Date: September 22, 2008 Posts: 485	"There is one gunzine writer whose rule of thumb is that the increase in velocity is 1/4 the increase in case capacity." Sorry but he didn't come up with that "rule of thumb". It's a well known "law of physics"! T.

April 26, 2013, 10:18 AM	#18
tobnpr Senior Member Join Date: August 1, 2010 Location: Tampa Bay Posts: 4,556	How could that be? A heavier projectile is going to realize proportionately less increase in velocity, than a lighter one, for any given increase in charge (?).