I have been doing some testing of hallow base bullets and aa#9. I mark all my cases with the powder weight and bullet type. I use a lone wolf 10mm threaded barrel in all my shooting. I fired 5 rounds of DT 155gr barnes down this barrel so I would have some test cases to compare against. The DT cases are snug/tight when put in the chamber and hard to pull out. My hotest test load was 15.25gr of aa#9 and the primers looked fine and they slip easily in the chamber. The pressure ring on the DT cases are .428 where my loads are from .426 to .4265. So can I keep going higher even though accurate says there max load is 15gr and my 15.25 looks to be under max. Thy do have a good amount of recoil which is fun. Look at my other post about rounds having pop. thanks Wanna kill these ads? We can help!