I have never done this before but size seems off. I ran some rem oil through the bore of clean rifle. Lubed an egg sinker with Lee brass lube. Tapped it in and used a plastic punch until about 1 inch in the bore. I used a rod and pushed the bullet through with no issues by hand. I can see rifling all over the lead but it measured out low end at .300 and high end .305.5
Isn't that undersized for a 308 bore? I am trying to find out why it won't shoot the 165 grain Missouri white tail bullets I bought less than shotgun patterns. Bullet is lubed no gas checks and sized at .311. Not having much luck with loading for this rifle. Have also loaded up jacketed Sierra SP with IMR 3031 powder and groups are worse. I finally found a box of Remington 170 cor locs to try through it next range trip but not expecting much better. I would rather load my own. Is the sizing off? I ran two through since I was getting the erratic readings. I thought cast was to be .01 or .02 over slugged size.
Isn't that undersized for a 308 bore? I am trying to find out why it won't shoot the 165 grain Missouri white tail bullets I bought less than shotgun patterns. Bullet is lubed no gas checks and sized at .311. Not having much luck with loading for this rifle. Have also loaded up jacketed Sierra SP with IMR 3031 powder and groups are worse. I finally found a box of Remington 170 cor locs to try through it next range trip but not expecting much better. I would rather load my own. Is the sizing off? I ran two through since I was getting the erratic readings. I thought cast was to be .01 or .02 over slugged size.