n5638b

Overall, and these are just my thoughts, I consider T7 a better powder than any of the Pyro's... It is cleaner, it is stronger, it is more consistent for me, also less smoke and smell, and it is less corrosive, emphasis on the word less. But, a lot of people do have a problem with what UC calls the crud ring usually showing up deep in the barrel near the load and bullet. There has been a ton of speculation on what might cause this crud ring - some people do not get it at all, while others report really bad ones.... In my case it is almost non-existent in all of my ML's.

One of the theories that has been expressed a lot is that hot primers may be the reason for the formation of the hard ring. Many people have switched primers to cooler primers or even switched ignition systems to help solve the problem. I am shooting Remington 209-4's (410 shotgun primers) and see very little of the crud ring... I also shoot a Austin & Halleck with a 32 HR mag conversion and an Omega with a 25 ACP conversion, both of these ignition systems seem to produce very little crud ring....My speculation has always been that is a reaction with what ever might be in your bore.

Swabbing with regular windex will take care of the problem most of the time really easy. I do swab after every shot, but can shoot 5/6 rounds before seating becomes a problem. I have reconciled this swabbing because that is the condition my bore will be in when I am hunting also.

Just a few of my thoughts....