Where do you acquire such cases? And how does one not assume pressure but affordably on a common man’s budget verify through testing where the pressure is at?
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.308 Winchester
- Thread starter Two Shoes
- Start date
Yeah but he clearly stated the 2740 fps load was from standard cases, not the hybrid. And I also have my doubts. about how safe that load is. Everyone in F class must be scratching their heads wondering why they need a barrel 10" longer to achieve those speeds.
And for the record, I'm a much bigger .308 fan than I am a 6.5 Creed, but if we're going to neck up Sig Fury cases to run stupid speeds for a .308, then we can just as easily neck them down to 6.5 and run them just the same. You can't cheat physics.
I mainly shoot 168 gr varieties in my PSS. I'll keep the barrel on it since it still produces good groups. I just got some Alpha srp brass for my 308 win, 7-08, and 260 AI. I'll most likely concentrate my efforts on the 260 AI for the upcoming year. The coyotes are plentiful, and my focus is on them. That and another EDC for my rotation.
American reloading has them. I picked some up a while back. Got 5 loads through them right now and still going strong. I started annealing them after the third firing. Anneal every time now.
I haven't leaned on them hard yet. Just running 45gr of varget under several different 175/178's. 20" 9 twist lilja, they're running 2690ish. Sd around 8-9 most days. I think the longest shot string I put together in one session was 20 shots.
I've got a pound of 2000-mr left somewhere. I'll probably burn it after I run out of varget. I shot a lot of that powder under 168 smk's in my old factory 12 twist. It's good for speed in a 308.
It looked like 45-90 was loading 48gr of 2000-mr under his 200.20x. My load for a 168 was 47gr. He's leaning on it pretty good.
Yup. There *is* a 'higher' node for the 30" barrels, around the 2720 range. Last time I tried getting there, I blew forty percent of the primers out of virgin Lapua Palma brass, and the remaining cases were pretty much wrecked as well. So 2740 out of a 22" factory barrel? Not buying it.
Bingo.
The 2740 fps for 200 gr SMK is from standard Lapua cases as shown in the picture with the empty cases...
The picture of the rifle with the Chronograph has the 2740 fps velocity on the chronograph screen!
Don't believe that...you don't want to believe.
It's not for those who don't want to do it, or improve upon the 308 Win. No one cares of ya do or don't, but it's real, & it's there for those who do...called choice.
My 30" runs the same load at 2856 fps for 200 gr SMK Lapua cases. And is my go to load for 308 LR. And 230 Atip at 2620 fps is a good 308 load, as is 225 eldm at 2675 with Lapua brass.
With hybrid cases the 200 gr has reached a maximum of 2951 fps, And the 225 Eldm 2719 fps. 3255 fps with 168 match with 30" barrel, as max...but I don't run the hybrid cases there.
Here is an 18" AR 10 shooting the same load 200 gr SMK around 2670 fps Lapua brass...do not recommend a steady diet in an AR but 200 at 2620 fps in an 18" AR 10 is doable, with Lapua brass.
And the 200 gr SMK 10 shot group in 22" 308 9 twist, Lapua brass, with a light weight hunting rifle.
The picture of the rifle with the Chronograph has the 2740 fps velocity on the chronograph screen!
Don't believe that...you don't want to believe.
It's not for those who don't want to do it, or improve upon the 308 Win. No one cares of ya do or don't, but it's real, & it's there for those who do...called choice.
My 30" runs the same load at 2856 fps for 200 gr SMK Lapua cases. And is my go to load for 308 LR. And 230 Atip at 2620 fps is a good 308 load, as is 225 eldm at 2675 with Lapua brass.
With hybrid cases the 200 gr has reached a maximum of 2951 fps, And the 225 Eldm 2719 fps. 3255 fps with 168 match with 30" barrel, as max...but I don't run the hybrid cases there.
Here is an 18" AR 10 shooting the same load 200 gr SMK around 2670 fps Lapua brass...do not recommend a steady diet in an AR but 200 at 2620 fps in an 18" AR 10 is doable, with Lapua brass.
And the 200 gr SMK 10 shot group in 22" 308 9 twist, Lapua brass, with a light weight hunting rifle.
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American reloading has them. I picked some up a while back. Got 5 loads through them right now and still going strong. I started annealing them after the third firing. Anneal every time now.
Would you be so kind as to link to the product? I looked on their website and couldn't find them, I looked both at primed brass and unprimed brass offerings.
I get them through American Reloading, make sure ya get the hybrid cases cause sometimes both are in stock.
I have been reloading these hybrid cases for several years, in various calibers, just fired some today in 8.6 Blackout, with 350 gr Maker at 1806 fps, in a 6.5 Twist Only, no 3 twist that's limited to 1050 fps or the bullet comes apart, with disastrous results.
I have gone over the procedure and process of forming hybrid cases dozens of times on this site to those interested...everything from case forming, lubes, neck turning into the shoulder, or complete shoulder, annealing, to produce consistent cases with no pinch points...to stuck case removal, load testing, etc.
But it's scattered all over the site.
The few that are interested get drowned out by all the negative responses.... but others have taken the information over the last couple of yrs and applied it to their shooting endeavors...and are doing it successfully, and reporting back.
The thing is ya don't have to run the hybrid cases at max to see a nice improvement.
I have loaded some pretty zippy losds in hybrid cases 5 times and primer pockets still tight.
I have several thousand hybrid cases in different calibers,and not working on the 308 at this time, but am working on the 8.6 Blk, 338 Spectre, & 510 Whisper calibers.
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Says they are out of stock at the moment.
Oh wait, I think I get it, you’re “just” necking up the .277 Sig cases to .308win?
Yes. I hit them with an expander mandrel first, then cram them in a 308 die, and presto! 308 hybrid cases.
They'd probably make good 7-08's too. Or anything 308 based really.
I remember asking you on how to reload these cases, but they were out of stock when I went to order. We need a sticky thread or whatever it's called on how to use the hybrid cases.
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