224 Clark

[JSH]

Yes, Brno action.

[barretcreek]

for those who have not read the articles, from Singleactions.com
Good info on any hotrod.


One more side-bar then we'll get to the range. When Ross Seyfried built his
6mm Mach IV in the early 90's he reported nose-diving accuracy. Barrels
usually start to fade over a few hundred rounds, not a couple dozen. Oddly
his big 6mm bug-holed for the first 200 pulls then fanned around 250. He
cleaned at 40 rounds, managed his intervals, and even bore-scoped. What
could cause such a precipitous drop off? It was only after Pac Nor's Chris
Dichter sectioned a barrel did they find the problem. Three inches past the
chamber was a ceramic-like layer of carbon that couldn't be cut with a dental
pick. This reinforces the need to clean every 15 rounds. Personally I find
<=10 to be ideal. If you don't stay ahead of this carbon print you'll have to
resort to hard abrasives (JB, Rem Clean, Flitz, etc). They'll de-carbon in a
flash but also wear your lands. I'd like to get away with ammonia based so I
plan to brush after 8 -10 shots.