6.5mmx284 to7.5x55 issue

Flavio · April 19, 2006, 06:00 PM

So today I got the cases (winchester 284) and I ran them through the resizing die and trimmed them and nothing... I did it with one so many times and nothing happens... the shoulder doesnt resize. What can I do ?

Don H · April 19, 2006, 06:52 PM

Do they fit in the chamber of your rifle?

Dave R · April 19, 2006, 09:04 PM

Just a note, .284Win is actually 7mm X 55. There's a 6.5/.284Win--that's a wildcat with the .284win brass necked down smaller. As opposed to what you're doing, which is necking the .284 UP to 7.5mm.

Don H got it right. Chamber a few to check fit. You shouldn't have to do anything else, except prime, add powder, seat bullets and shoot 'em.

Ahhh, you may want to test bullet seating depth with an empty, un-primed case before you do the above. Post if you need directions on how to test for seating depth, to make sure you keep the bullet just off the rifling lands.

Flavio · April 19, 2006, 09:35 PM

Isee the thing is that I got the 6.5 mm ones

hoghunting · April 19, 2006, 10:42 PM

www.sportsmansguide.com has the 7.5x55 ammo on sale in their Spring Shooting Catalog.

Flavio · April 19, 2006, 11:49 PM

I got the 6.5-284 from Norma, I resized them, trimmed/chamfered them and when I try them out the bolt doesnt close.

Flavio · April 20, 2006, 12:00 AM

I tried it with a bullet and without one and they just dont fit.

Leftoverdj · April 20, 2006, 12:40 AM

With the ram in the up position, you need to screw your 7.5 Swiss sizing die in until it touches the shellholder and another 1/8 to 1/4 turn further. The .284 shoulder must be pushed back slightly to make 7.5 Swiss.

guntotin_fool · April 20, 2006, 01:52 AM

You have Problems if you are trying to make a 7.5 x55 or 7.5 swiss out of a 284 Win. parent case, They have the wrong case head size. The base web dimension of a .284 case is .500" with a rebated rim diameter of .473. The 7.5 swiss has a base web (measured right above the Extractor groove) of .483 and a rim diameter of .493. If you had enough muscle to swage down the base web to fit into your chamber, the rim variation would almost guarantee that you would have extraction issues.

Why are you trying to make this conversion? 7.5 swiss bass is readily available.

Leftoverdj · April 20, 2006, 02:13 AM

Gun, Sierra shows the 7.5 Swiss at .495 over the web. Since half the folks shooting 7.5s are using .284 brass, it's pretty clear that it works.

guntotin_fool · April 20, 2006, 04:41 AM

Well saami and hornady say it is not 495 but 500, and seeing as you can buy 7.5 ready made why bother?

http://www.midwayusa.com/eproductpag...eitemid=604292

http://www.midwayusa.com/eproductpag...eitemid=197011

by saving about 8 bucks you get the wrong rim, questionable dimensions, and the wrong headstamp...

Why?

Flavio · April 20, 2006, 01:47 PM

Dj, I did what your wrote and it didnt work out... The thing is that Im using a hand press, dont know if that make any difference.

Leftoverdj · April 20, 2006, 02:02 PM

Flavio, that may be the problem. You need a pretty serious press and good lube for case reforming.

Flavio · April 20, 2006, 02:05 PM

thats what I thought... Hand press doesnt provide a great amount pressure... What kind of lube would you recommend ?

Leftoverdj · April 20, 2006, 03:15 PM

Lee Lube is good. Imperial or anhydrous lanolin are better, but they might not be available to you.

This is very difficult to do without being able to see anything. It would be easy in my shop with cases, dies, and rifle at hand. Your best bet is to find a experienced reloader locally. We are generally a friendly lot and glad to give a hand.

Dave R · April 20, 2006, 08:50 PM

Agreed, Lee lube is good.

Regarding presses, I think any good "O" press will generate enough force for you. Lee's new "classic" press is a pretty good value. Under $50, if I recall. That's what I use.

You can still use your hand press for other processes, like seating bullets, or even full-length sizing after the initial re-forming is done.

If fact, if you know someone who's got a good "O" press, you might just ask to borrow it for reforming.

It may be a bit harder to form 7.5 from 6.5. You may split some necks when expanding them. I split 3 out of 100 when reforming from .284Win brass.

Hmmm, if you can find someone with some .284Win dies, you may want to make the transition in 2 steps. First, reform the 6.5X.284 to "regular" .284Win. That's a 1/2mm step. Then use your 7.5 Swiss dies to take them up the last 1/2 mm.

OTOH, it sounds like you've already reformed some of them (although the shoulder seems to be too high) without splitting necks, so you may be fine just using one step, from 6.5 to 7.5.

**Unclenick** · April 20, 2006, 10:57 PM

Hate to see that expensive Norma brass reworked. I have 700 of those cases. Never seen such good numbers off my case gauge except Lapua. You may want to see if you can trade it for some Schmidt Rubin brass?

On lubrication, try STP motor oil additive. Seems to work pretty well for forming. Straight out of the can - no dilution.

Nick

April 19, 2006, 06:00 PM	#1
Flavio Senior Member Join Date: February 23, 2006 Location: Miami, Fl Posts: 107	6.5mmx284 to7.5x55 issue So today I got the cases (winchester 284) and I ran them through the resizing die and trimmed them and nothing... I did it with one so many times and nothing happens... the shoulder doesnt resize. What can I do ?

April 19, 2006, 09:04 PM	#3
Dave R Senior Member Join Date: January 7, 2000 Location: Idaho Posts: 6,073	Just a note, .284Win is actually 7mm X 55. There's a 6.5/.284Win--that's a wildcat with the .284win brass necked down smaller. As opposed to what you're doing, which is necking the .284 UP to 7.5mm. Don H got it right. Chamber a few to check fit. You shouldn't have to do anything else, except prime, add powder, seat bullets and shoot 'em. Ahhh, you may want to test bullet seating depth with an empty, un-primed case before you do the above. Post if you need directions on how to test for seating depth, to make sure you keep the bullet just off the rifling lands. __________________ I am Pro-Rights (on gun issues).

April 20, 2006, 08:50 PM	#16
Dave R Senior Member Join Date: January 7, 2000 Location: Idaho Posts: 6,073	Agreed, Lee lube is good. Regarding presses, I think any good "O" press will generate enough force for you. Lee's new "classic" press is a pretty good value. Under $50, if I recall. That's what I use. You can still use your hand press for other processes, like seating bullets, or even full-length sizing after the initial re-forming is done. If fact, if you know someone who's got a good "O" press, you might just ask to borrow it for reforming. It may be a bit harder to form 7.5 from 6.5. You may split some necks when expanding them. I split 3 out of 100 when reforming from .284Win brass. Hmmm, if you can find someone with some .284Win dies, you may want to make the transition in 2 steps. First, reform the 6.5X.284 to "regular" .284Win. That's a 1/2mm step. Then use your 7.5 Swiss dies to take them up the last 1/2 mm. OTOH, it sounds like you've already reformed some of them (although the shoulder seems to be too high) without splitting necks, so you may be fine just using one step, from 6.5 to 7.5. __________________ I am Pro-Rights (on gun issues).

April 20, 2006, 10:57 PM	#17
Unclenick Staff Join Date: March 4, 2005 Location: Ohio Posts: 21,060	Hate to see that expensive Norma brass reworked. I have 700 of those cases. Never seen such good numbers off my case gauge except Lapua. You may want to see if you can trade it for some Schmidt Rubin brass? On lubrication, try STP motor oil additive. Seems to work pretty well for forming. Straight out of the can - no dilution. Nick __________________ Gunsite Orange Hat Family Member CMP Certified GSM Master Instructor NRA Certified Rifle Instructor NRA Benefactor Member and Golden Eagle

April 19, 2006, 06:52 PM	#2
Don H Senior Member Join Date: May 8, 2000 Location: SLC,Utah Posts: 2,704	Do they fit in the chamber of your rifle?

April 19, 2006, 09:35 PM	#4
Flavio Senior Member Join Date: February 23, 2006 Location: Miami, Fl Posts: 107	Isee the thing is that I got the 6.5 mm ones

April 19, 2006, 10:42 PM	#5
hoghunting Senior Member Join Date: March 27, 2006 Posts: 1,559	www.sportsmansguide.com has the 7.5x55 ammo on sale in their Spring Shooting Catalog.

April 19, 2006, 11:49 PM	#6
Flavio Senior Member Join Date: February 23, 2006 Location: Miami, Fl Posts: 107	I got the 6.5-284 from Norma, I resized them, trimmed/chamfered them and when I try them out the bolt doesnt close.

April 20, 2006, 12:00 AM	#7
Flavio Senior Member Join Date: February 23, 2006 Location: Miami, Fl Posts: 107	I tried it with a bullet and without one and they just dont fit.

April 20, 2006, 12:40 AM	#8
Leftoverdj Senior Member Join Date: October 15, 2004 Posts: 934	With the ram in the up position, you need to screw your 7.5 Swiss sizing die in until it touches the shellholder and another 1/8 to 1/4 turn further. The .284 shoulder must be pushed back slightly to make 7.5 Swiss.

April 20, 2006, 01:52 AM	#9
guntotin_fool Senior Member Join Date: November 18, 2004 Posts: 1,446	You have Problems if you are trying to make a 7.5 x55 or 7.5 swiss out of a 284 Win. parent case, They have the wrong case head size. The base web dimension of a .284 case is .500" with a rebated rim diameter of .473. The 7.5 swiss has a base web (measured right above the Extractor groove) of .483 and a rim diameter of .493. If you had enough muscle to swage down the base web to fit into your chamber, the rim variation would almost guarantee that you would have extraction issues. Why are you trying to make this conversion? 7.5 swiss bass is readily available.

April 20, 2006, 02:13 AM	#10
Leftoverdj Senior Member Join Date: October 15, 2004 Posts: 934	Gun, Sierra shows the 7.5 Swiss at .495 over the web. Since half the folks shooting 7.5s are using .284 brass, it's pretty clear that it works.

April 20, 2006, 04:41 AM	#11
guntotin_fool Senior Member Join Date: November 18, 2004 Posts: 1,446	Well saami and hornady say it is not 495 but 500, and seeing as you can buy 7.5 ready made why bother? http://www.midwayusa.com/eproductpag...eitemid=604292 http://www.midwayusa.com/eproductpag...eitemid=197011 by saving about 8 bucks you get the wrong rim, questionable dimensions, and the wrong headstamp... Why?

April 20, 2006, 01:47 PM	#12
Flavio Senior Member Join Date: February 23, 2006 Location: Miami, Fl Posts: 107	Dj, I did what your wrote and it didnt work out... The thing is that Im using a hand press, dont know if that make any difference.

April 20, 2006, 02:02 PM	#13
Leftoverdj Senior Member Join Date: October 15, 2004 Posts: 934	Flavio, that may be the problem. You need a pretty serious press and good lube for case reforming.

April 20, 2006, 02:05 PM	#14
Flavio Senior Member Join Date: February 23, 2006 Location: Miami, Fl Posts: 107	thats what I thought... Hand press doesnt provide a great amount pressure... What kind of lube would you recommend ?

April 20, 2006, 03:15 PM	#15
Leftoverdj Senior Member Join Date: October 15, 2004 Posts: 934	Lee Lube is good. Imperial or anhydrous lanolin are better, but they might not be available to you. This is very difficult to do without being able to see anything. It would be easy in my shop with cases, dies, and rifle at hand. Your best bet is to find a experienced reloader locally. We are generally a friendly lot and glad to give a hand.