I have not been satisfied with the cast boolit groups that I have been shooting in my scoped Garand. I have been shooting a PCed 200+ grain 314299 boolit in front of 34 grains and 35 grains of IMR4895. Sized 0.311”to 0.312”. Groups run 3” to 3.5” and sometimes go to 4” plus at 100 yards. I decided to see if it is the rifle or the load. I loaded some 150 grain Speer jacketed bullets in front of 46 grains of IMR4895. I shoot two 10-round groups.
1st group. I backed the Schuster plug out almost completely to ensure the rifle functioned as a single shot rifle. Fired two shots to find the zero. Then fired a 10-shot group. Measured 1.97” center to center at 100 yards.
2nd group. I closed the Schuster plug almost completely to ensure the rifle functioned as designed. Then fired a 10-shot group. Measured 2.25” center to center at 100 yards.
Does not appear to be a problem with the rifle. I weigh and group the boolits by +or- 0.5 grains. Lead composition is Lyman #2 and is water quenched from about 425F. I am wondering if the powder charge is not where it needs to be or if I am trying to push too much boolit diameter down the barrel. I will be very interested in any comments. Will post photos later. Having problems uploading photos.
Pirate69