happens every 40-50 rounds. granted, it's still holding just over MOA (1.25-1.5ish) when it does it, but as you can see, that's still well outside the rig's potential.
the good news is, it's very easy and quick to clean. a single run of foaming bore cleaner takes care of everything and it's good to go.
even after it was good and dirty, and opened up a good amount at 100, it was pinging my steel at 300 (8x8) without fail, and that was a 12-shot string stopping only to put 3 more in the belly each time.
prolly end up going moly just so i don't have to clean it religiously.
tube has prolly 75-80 rounds through it? maybe 100, but that's a big maybe.
I have been using Moly (and lots of 120gr Barnes 7mm bullets) for a very long time and I really cannot remember the last time I thouroughly cleaned a rifle barrel. This includes my varmint rifles in 222 and 223 that see lots of bullets down the pipe in a year.
All that to say, you are on the right track - both counts.
Glad your rifle is shooting well for you now.
