orgoniun
Member
Ben you are correct, Measured again today and got .309/.301 - Measured with a dial caliper.Steve
Could the 309 / 307 numbers be an error ?
Can you tell us what you're using to take this measurement with ?
Most 30 cal. barrels are 308 / 300 or 309 / 301.
The 309 / 307 numbers would make the height of your rifling only .001".
Ben
Got some sample pacs of GC to play with but am a little confused on the thickness of them, How do I know what thickness to use on my bullets ?