Marlin Junky
12-13-2010, 06:23 PM
Basically, is this feasible and if so, do I shoot 'em fast, or what?
The patient is a '52 vintage M70 in 30-'06 and every time I shoot it there is a gray wash in the same narrow location near the muzzle. When I use boolits with more Sb, it gets worse much quicker. I've been trying to keep the velocities below 2000 fps during this development phase and accuracy really goes to pot once I exceed 1900 fps with the worse groups associated to a commercial cast SAECO 316 at about 154-155 grains with the GC in place. The rifle also has a tendency to print the first two rounds from a clean barrel touching and the next round nearly two inches away. I just started shooting .3095" boolits today but I suspect it actually may shoot a little bit better with a little more diameter even though the barrel measures between .308" and .309" in the grooves.
Anyone out there ever have a problem with rough patches in the bore that was solved by shooting a bunch of jacketed bullets? Even though this rifle is decades old, it's been in my wife's family since the early 60's and not shot much.
MJ
The patient is a '52 vintage M70 in 30-'06 and every time I shoot it there is a gray wash in the same narrow location near the muzzle. When I use boolits with more Sb, it gets worse much quicker. I've been trying to keep the velocities below 2000 fps during this development phase and accuracy really goes to pot once I exceed 1900 fps with the worse groups associated to a commercial cast SAECO 316 at about 154-155 grains with the GC in place. The rifle also has a tendency to print the first two rounds from a clean barrel touching and the next round nearly two inches away. I just started shooting .3095" boolits today but I suspect it actually may shoot a little bit better with a little more diameter even though the barrel measures between .308" and .309" in the grooves.
Anyone out there ever have a problem with rough patches in the bore that was solved by shooting a bunch of jacketed bullets? Even though this rifle is decades old, it's been in my wife's family since the early 60's and not shot much.
MJ