Ok, I listened to latest Podcast, about section on why so many shooters have accuracy issues using the heavies. I found it to be consistent with my extensive testing. Here are the points in the podcast, in case you didnt listen:
1) High twist rate and long bullets that have certain center or gravity could cause accuracy issues because the bullet could deform. (paraphrasing)
2) Bullets pushed too hard have issues with high twist rate barrels. (This is correlated by ppl like myself pushing 90 grain Sierra hard and they just disenigrate in mid air (few/some))
3) Berger bullets are a more stout construction, and this is a reasonable reason why they are notable solid performers in the 80-85 grain bullets. (this is reasonable, because I am shredding "some" hornady and Sierra bullets in the 1:6.5 twist,but never 1 Berger.
4) it was related to other caliber guns about twist rates, and 5.56, and noted that "6"twist rate guns are not comparable accuracy to "normal" twist rate guns in calibers related....
That podcast explained perfectly, why in same magazine, I shoot a 1.5 MOA group or so with heavies, then shoot a ~.7 MOA group with Berger 77 OTM (tangent design/super sturdy construction, vastly different center of gravity than heavies...) Just switching the bullet, BANG, nuts accurate in that super fast twist. Plus I like to run all my loads at max or over max. Near all.
So to sum up the entire theory, its basically this. 1:6.5 twist is not "best balance" approach for Valkyrie.
Perhaps, Rock Creek has right idea about 1.6.7 or a gain twist of 1:7.2-1:6.5, or just flat out 1:7. 1:7 does not shoot "some" bullets I tested, they keyhole. But it seems to shoot 88 and 90 grain just fine, as well as 85 RDF just fine.
Conclusion for me not buying a 1:6.5 twist barrel ever again, going to see if I can get WOA to make me a Krieger blank 1:6.8 or gain twist as noted above.
I thank Lowlight, and Berger, and is it Bryan? For that insightful and thoughtful podcast. After I keyholed using 1:7, I thought 1:7 sucked, and 1:6.5 was the answer. After buying many 1:6.5's to test, I have to admit, I was probably VERY wrong about that. I don't like 1:6.5 at all, and that is it for me of that.
Great info, I love constructive and insightful discussions like that.
Semper Fi gentlemen.
1) High twist rate and long bullets that have certain center or gravity could cause accuracy issues because the bullet could deform. (paraphrasing)
2) Bullets pushed too hard have issues with high twist rate barrels. (This is correlated by ppl like myself pushing 90 grain Sierra hard and they just disenigrate in mid air (few/some))
3) Berger bullets are a more stout construction, and this is a reasonable reason why they are notable solid performers in the 80-85 grain bullets. (this is reasonable, because I am shredding "some" hornady and Sierra bullets in the 1:6.5 twist,but never 1 Berger.
4) it was related to other caliber guns about twist rates, and 5.56, and noted that "6"twist rate guns are not comparable accuracy to "normal" twist rate guns in calibers related....
That podcast explained perfectly, why in same magazine, I shoot a 1.5 MOA group or so with heavies, then shoot a ~.7 MOA group with Berger 77 OTM (tangent design/super sturdy construction, vastly different center of gravity than heavies...) Just switching the bullet, BANG, nuts accurate in that super fast twist. Plus I like to run all my loads at max or over max. Near all.
So to sum up the entire theory, its basically this. 1:6.5 twist is not "best balance" approach for Valkyrie.
Perhaps, Rock Creek has right idea about 1.6.7 or a gain twist of 1:7.2-1:6.5, or just flat out 1:7. 1:7 does not shoot "some" bullets I tested, they keyhole. But it seems to shoot 88 and 90 grain just fine, as well as 85 RDF just fine.
Conclusion for me not buying a 1:6.5 twist barrel ever again, going to see if I can get WOA to make me a Krieger blank 1:6.8 or gain twist as noted above.
I thank Lowlight, and Berger, and is it Bryan? For that insightful and thoughtful podcast. After I keyholed using 1:7, I thought 1:7 sucked, and 1:6.5 was the answer. After buying many 1:6.5's to test, I have to admit, I was probably VERY wrong about that. I don't like 1:6.5 at all, and that is it for me of that.
Great info, I love constructive and insightful discussions like that.
Semper Fi gentlemen.