Have a 22-250 with 6.5 twist Bartlein 5r barrel. Couple boxes of 88 grain ELD-M. Hornady says 2750 max. Thoughts? Figured could try and/if fail then try monos.
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22-250 6.5 twist. Thoughts?
- Thread starter dustbag
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I have a 7 twist 22-250AI and have shot 50 grain Vmax @ 3950. Maybe I got lucky but they didn't vaporize, but they sure cut a jackrabbit in half at 200 yards.
Seems silly to limit the velocity to 2750.
Did some reading sounds like some get up to 3200 and some don't. Thought might work til throat gets rough. Gonna find out I guess
I shoot 85.5 Berger's at 3300 in a 7 twist, I think you can shoot 90 matchkings with the 6.5". I would keep them right around 3000fps, if you start to loose bullets switch to a solid like a hammer. They are a bit more expensive but you won't blow any up. I would say you can go way above their limit, but they tell you that so you don't bitch at them when you loose bullets
Thanks!
VLD Pilot
Well-Known Member
Mostly likely the RPMs will destroy most bullets shot thru the barrel if pushed too fast. Mono's would be the best option and could actually use the full capability of the cartridge.
Picked up scope today. Hopefully try it Sunday. Thanks!
VLD Pilot
Well-Known Member
My 8 twist stabilizes that 90 Berger fine at 3250 fps at 1500' elevation. I'm sure a 7.5 would do it more reliably but it's not key holing and accuracy is decent. Not nearly as good as the 80s.
Gain twist to 7.5 to 6.5 worked well for my 1000 yard 20 inch AR15 service rifle launching the 90 VLDs. 0.2558 and 0.170 freebore
I looked into building one of these earlier this year. I ultimately decided to stick with a .243 fast twist, however from all of my research I pretty much found 1-7.5 to 1-8 was the best choice to keep bullets alive. A lot of the 1-6.5 and 1-7 recommendations are for .223s in service rifle and FTR launching 80-95gr bullets at much slower velocities. A lot of people don't have problems with higher velocities than that and the faster twists, but I'd rather side with caution. You can always shoot 75-80s in a 1-7.5 but if you have a 1-6.5 and it blows up everything you're kind of stuck. Also, a lot of times the bullets will stay together until the barrel gets fouled up, warm, or gets 300+ shots on it and the bore gets rough. Then it'll start to blow up bullets. A .223 pushing s 90 at 2800ish is a lot different than a 22-250 Ackley pushing it at 3200+. Just my opinion.
Thank you.
I've shot an 8T 22-250 at 1000 yard matches launching 80s with great results..no need to push velocity to the limit to kill paper.
Update
H4350 88 eldm
Started low at 30 grains up to a compressed 38 grains. .020 off. No pressure. Got just over 3200 and held together. About 70 rounds through it now. Settled at 36.5 running at 3190. Grouping in the .4 range. Gonna mess with seating. Just happy they're holding together cause I got lots of em.
H4350 88 eldm
Started low at 30 grains up to a compressed 38 grains. .020 off. No pressure. Got just over 3200 and held together. About 70 rounds through it now. Settled at 36.5 running at 3190. Grouping in the .4 range. Gonna mess with seating. Just happy they're holding together cause I got lots of em.
