.243 Winchester and W780

Dan Newberry · February 1, 2013, 12:39 AM

I could not return a PM due to the fact that the system said it was blocked for some reason... strange...

so here is the gist of it, minus user's name...

Quote:

Hey Dan I was wondering, you shoot a ton of .243 winchester, and I like to shoot it as well, I want to know have you ever tried Magnum primers with this powder and 100 grain bullets?

I haven't, but that combo should work very well. Winchester is using about 46 grains of the 780 behind their 100's... and a magnum primer would likely work great in that combo.

Dan

hooligan1 · February 1, 2013, 07:55 AM

Hey Dan, My current loading with that powder is the max load of 47.5 grains, so I wanted input and you seem like THE man.
Thanks for your help.
Hooligan1

( I will start my testing over, once I have found a supply of CCI 250's)

Dan Newberry · February 1, 2013, 10:08 AM

I'm sure not "the man"

... but as to the magnum primer with ball powders, Speer recommended them for years... they might still, I don't have the current Speer manual.

I think a WLR primer would work well too, however.

What velocity are you getting with 100 grain bullets and the 47.5 grain charge?

Dan

hooligan1 · February 1, 2013, 06:16 PM

I don't have a chrono, so thats' up in the air, but it's accurate, repeatable, easy recoil.
I pulled bullets from the Winchester 100 grain "grey box" cartridges and found that the powder they use resembles the 780 Supreme,( and they shot well from our rifles) so I picked up a lb and started testing, hitting the OCW at 47.5 with the Sierra Gamekings 100 grainers.
I'm shooting a Mark X Zastava with a #301 lightweight Timney, set right at 2.5 lbs. The stock is freefloated but not bedded. When I can afford I will send it off or do it myself. But right now it shoots under an inch at 100 yds.

FrankenMauser · February 2, 2013, 05:08 PM

I run W780 and AA3100 behind 95 gr bullets (I don't shoot 100s).

I have run CCI LR, CCI LRM, Federal LRM, and WLR primers in the loads (old rifle). None of them proved to be any better than another, as far as accuracy. However, I wasn't shooting over a chronograph, so my only data points were the holes in the target.

Currently (new rifle), I believe I am only using magnum primers with W780; but I don't have the data right in front of me.

hooligan1 · February 4, 2013, 06:40 PM

I'm planning on testing the CCI 250 primer and Winchester 780 Supreme, and I will be testing it with both 95 grain Ballistic Tips, and 100 grain Sierra Gamekings. The 95 grain B-tips haven't been easy to find the perfect powder for as of yet, but the Gamekings were easy, it came right along, so now I will start over and give the magnum primer a shot (no pun intended).
I still have test loads with standard CCI 200 Primers, and RL 22 powder, with the 95 grain B-Tips, hopefully I can find something this bullet likes, if not then I will move back to lighter bullets, maybe say the 90 grain Accubond, or even lighter for varmit shootin.

hooligan1 · February 8, 2013, 12:52 PM

Just finished loading 3 test loads with 100 grain Sierra Gamekings: 5 rounds each.
1. CCI 250 primer
2. R-P brass
3. 45.0 grains of Winchester 780 Supreme.
46.0 grains of Winchester 780 Supreme.
47.0 grains of Winchester 780 Supreme.
4. oal 2.345 w/comparator

February 1, 2013, 07:55 AM	#2
hooligan1 Senior Member Join Date: July 18, 2010 Location: Independence Missouri Posts: 2,844	Hey Dan, My current loading with that powder is the max load of 47.5 grains, so I wanted input and you seem like THE man. Thanks for your help. Hooligan1 ( I will start my testing over, once I have found a supply of CCI 250's) __________________ Thanks for coming!

February 1, 2013, 06:16 PM	#4
hooligan1 Senior Member Join Date: July 18, 2010 Location: Independence Missouri Posts: 2,844	I don't have a chrono, so thats' up in the air, but it's accurate, repeatable, easy recoil. I pulled bullets from the Winchester 100 grain "grey box" cartridges and found that the powder they use resembles the 780 Supreme,( and they shot well from our rifles) so I picked up a lb and started testing, hitting the OCW at 47.5 with the Sierra Gamekings 100 grainers. I'm shooting a Mark X Zastava with a #301 lightweight Timney, set right at 2.5 lbs. The stock is freefloated but not bedded. When I can afford I will send it off or do it myself. But right now it shoots under an inch at 100 yds. __________________ Thanks for coming!

February 2, 2013, 05:08 PM	#5
FrankenMauser Senior Member Join Date: August 26, 2008 Location: 1B ID Posts: 5,399	I run W780 and AA3100 behind 95 gr bullets (I don't shoot 100s). I have run CCI LR, CCI LRM, Federal LRM, and WLR primers in the loads (old rifle). None of them proved to be any better than another, as far as accuracy. However, I wasn't shooting over a chronograph, so my only data points were the holes in the target. Currently (new rifle), I believe I am only using magnum primers with W780; but I don't have the data right in front of me. __________________ "Such is the strange way that man works -- first he virtually destroys a species and then does everything in his power to restore it."

February 4, 2013, 06:40 PM	#6
hooligan1 Senior Member Join Date: July 18, 2010 Location: Independence Missouri Posts: 2,844	I'm planning on testing the CCI 250 primer and Winchester 780 Supreme, and I will be testing it with both 95 grain Ballistic Tips, and 100 grain Sierra Gamekings. The 95 grain B-tips haven't been easy to find the perfect powder for as of yet, but the Gamekings were easy, it came right along, so now I will start over and give the magnum primer a shot (no pun intended). I still have test loads with standard CCI 200 Primers, and RL 22 powder, with the 95 grain B-Tips, hopefully I can find something this bullet likes, if not then I will move back to lighter bullets, maybe say the 90 grain Accubond, or even lighter for varmit shootin. __________________ Thanks for coming!

February 8, 2013, 12:52 PM	#7
hooligan1 Senior Member Join Date: July 18, 2010 Location: Independence Missouri Posts: 2,844	Just finished loading 3 test loads with 100 grain Sierra Gamekings: 5 rounds each. 1. CCI 250 primer 2. R-P brass 3. 45.0 grains of Winchester 780 Supreme. 46.0 grains of Winchester 780 Supreme. 47.0 grains of Winchester 780 Supreme. 4. oal 2.345 w/comparator __________________ Thanks for coming!

February 1, 2013, 10:08 AM	#3
Dan Newberry Senior Member Join Date: October 3, 2012 Location: Wytheville, VA Posts: 183	I'm sure not "the man" ... but as to the magnum primer with ball powders, Speer recommended them for years... they might still, I don't have the current Speer manual. I think a WLR primer would work well too, however. What velocity are you getting with 100 grain bullets and the 47.5 grain charge? Dan __________________ *www.BANGSTEEL.com* Practical Long Range Rifle Courses... Optimal Charge Weight handload consulting