Jamesb570 wrote:Hi all, Just trying to tap into the collective brains trust for some knowledge - I have an Eddystone M17 that had been converted back to .308 for range work. I have all the gear to take her up to 300 H&H and that was the direction I was going until I measured the twist rate on the retro-fitted barrel and a little snag came up. The barrel fitted has a 1:10 twist.
I already have a Remington .308 as a general purpose hunting rifle and so was planning to go up to 300 H&H and use heavier projectiles for bigger game.
Conventional wisdom states that for heavier bullets i.e. 180 - 220gn in .30 cal then a 1:12 barrel is recommended.
My question is this - Would the 1:10 twist barrel work with 180-220gn projectiles? Has anyone had experience with doing this and did it work for you? As I have stated I know what the theories say but was looking for some real world experiences?
Any help is appreciated. Thanks James
Jamesb570 wrote:Conventional wisdom states that ..........s
straightshooter wrote:By 'Conventional wisdom' I expect you mean opinions.
The twist rate is purely dictated by physics.
1 in 10 will adequately stabilize up to 220 grain projectiles in 30 caliber chamberings from 308 and larger.
straightshooter wrote:At this point we now turn up the pedanticism to level 8.
Daddybang wrote:My bloody head hurts!!!
Jamesb570 wrote:Good for you Prios, If someone could explain this in Pics it might help me? No really, I think I just let the numbers fake me out and didn't really get that 1:10 is better suited to longer / heavier projectiles than 1:12. I will explore the formulas provided etc to work out what projectiles might be the most suitable but the project will continue ( given all the crap I have acquired to complete the build that is just as well). Thanks for all the help
marksman wrote:well done, I was sort of scratching my head thinking that I didn't get the question as a 1:10 twist is usually what factory rifles will have to suit the heaviest projectiles that can be loaded for that round
grandadbushy wrote:HERE goes ;;;;;;;; I have stated on this forum a while back that i'm going to rebarrel a 30-06
Now what twist rate is perfect for 162--175gr bullets not boarder line not over stabilising one that will do it comfortably
Your help would be appreciated
Cheers