Loading for a 6x47 Lapua

Troy G

Troy G

CGN Regular
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Action is a Stiller Tac 30
Manners T4 stock with a pound of lead in butt.
AICS Bottom metal
Nightforce 5.5-22 Varminter in Seekins Rings and 20moa Rail
Bartlein Barrel 1/8 Twist at 28"
Shooting off the hood of my 89 GMC 4x4 with an Atlas bipod and sand bags for a rear at 100 meters.
Smithed by Craige Douglas

Started load development last summer but ran out of time to shoot before my second son was born. I wanted to try some H4350 with some Berger 105 Hybrids, I was using old 95gr Berger VLDs initially.

After I finally got my hands on some powder I reviewed what poor shooting notes I had made and I shot some groups that looked like they had some potential. I have been getting up early in the morning before work to try and get some calmer conditions with little mirage. I had another look at my notes and switched back to VV-160. Went out tonight and shot the following three shot group.
41grs VV-160 Berger 105 Hybrid, 205M Primer. .269 Bushing with a reamer for no turn .274 neck. COAL is 2.700 give or take a couple of thou.



Next step is to hopefully get some time to shoot more groups over the chronograph and see what the SD and ES is. Maybe try some of the RL-17 I have and try and make the H4350 work as well.
 
I had a 6x47 a few years ago that shot like that too. It shot best though with large primer brass - not the Lapua cases.

If you want to try large primers, just run some 22-250 brass through your resizing die. The sides will collapse just a bit when you resize but you can blow them out with a light load. After that I guarantee your velocity spreads will settle down with large primer brass.

4350 was my powder of choice.
 
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I have to shoot more groups and at further distances. I have no idea what the velocity or ES is going to be. One group at 100 meters don't tell the entire story. I sure hope the ES is low, would be nice if I could get near single digit ES with a large sample of shots. Did you ever try going to a CCI-450 primer before you went the 22/.250 large primer route?
 
Troy G said:
I have to shoot more groups and at further distances. I have no idea what the velocity or ES is going to be. One group at 100 meters don't tell the entire story. I sure hope the ES is low, would be nice if I could get near single digit ES with a large sample of shots. Did you ever try going to a CCI-450 primer before you went the 22/.250 large primer route?
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Buddy I tried everything. Keep in mind it was January when I did the testing.

Have you noticed any sort of delay between the click and the bang?

I had 300 rounds through my gun before I finally had a load I could believe in. Using large primers only.

With small primers and January temperatures I could literally count to 3 between the click and the bang. Now we could say that's ok it's summer time now so not a problem, but I don't agree, With small primers the velocity spreads were just stupid. In a 5 round string, the ES may not have been too bad, but keep shooting and it was anybody's guess. 100 fps variation was common.

My final solution was to use 6XC brass only because resizing was easier than 22-250. I would run it through the 6x47 FL die then trim OAL.

When I loaded carefully using 6XC brass that was selected by identical weight, the velocity was so consistent that I had to turn the chronograph off and on between shots. It kept coming up with the exact same velocity.

My 6x47 had a Gary Schnieder barrel on it with polygonal rifling - he is the barrel maker recommended to me by G David Tubbs. I had several conversations with him regarding the use of his brass for the 6x47 as he was quite curious of my progress.

The 6x47 with 6XC brass was the most accurate rifle I ever owned, but barrel life was short. It died a sudden death at 800 rounds.

I later replaced that barrel with a Broughton and it was never the same.
 
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There is no hang fires now but it is not winter in Canada. Hopefully this weekend I will get a chance to run some strings over the chronograph and see what ES is.
 
My 6x47 lapua is extremely accurate. I had my load in under 40 rounds. It is 39.2 grains of H4350 with berger 108 BT at 50 thou off hard engrave, turned to .266 for a .269 chamber. I have shot sub one inch 5 shot groups at 500 yards on occasion.
 
Canuck525 said:
My 6x47 lapua is extremely accurate. I had my load in under 40 rounds. It is 39.2 grains of H4350 with berger 108 BT at 50 thou off hard engrave, turned to .266 for a .269 chamber. I have shot sub one inch 5 shot groups at 500 yards on occasion.
Click to expand...

What primer are you using?

NormB
 
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