GAnderson
Gold $$ Contributor
I've got a .243 factory rifle with the standard 1-10 6gr barrel that shoots lead core bullets exceptionally well. I have come to acquire a substantial stash of Barnes 80gr TTSX monolithic bullets and have tried everything to get them to group acceptable and they just won't. At BEST I can squeak out an 1 1/4" group every now and then at 100yds. I have tried all the suggestions and powders that Barnes gives on this bullet and I realize that mono bullets aren't known for superior accuracy...but I do feel as though the 1-10 twist may not be stabilizing this bullet as good as it should since these bullets are somewhat longer than traditional bullets in the same weight category...Barnes maintains that a 1-10 should stabilize them.
So I got to looking at the various barrels that are available with different rifling and twist rates. I see 6mm 1-9 6gr, 1-8 3gr, 1-8 6gr, 1-8 5R gr and 1-8 3R gr as well as faster twists in the 1-7 area. The 1-9 might work better than the 1-10 but I am thinking a 1-8 will be the best hopefully. My question is in regards to the number of grooves and potential of the 3R or 5R rifling? Has anyone been down this road with mono bullets and felt that the 3 groove is better than the 6 groove and/or would one of the "R" riflings be even better? I am thinking the 5R 1-8 might get me what I want. Please share your thoughts.
Thanks,
Gene
So I got to looking at the various barrels that are available with different rifling and twist rates. I see 6mm 1-9 6gr, 1-8 3gr, 1-8 6gr, 1-8 5R gr and 1-8 3R gr as well as faster twists in the 1-7 area. The 1-9 might work better than the 1-10 but I am thinking a 1-8 will be the best hopefully. My question is in regards to the number of grooves and potential of the 3R or 5R rifling? Has anyone been down this road with mono bullets and felt that the 3 groove is better than the 6 groove and/or would one of the "R" riflings be even better? I am thinking the 5R 1-8 might get me what I want. Please share your thoughts.
Thanks,
Gene