That seems like pretty reasonable accuracy - as long as you do your part, those guns will do theirs. Of course, like the rifleer said, your part includes finding the right charge and keeping it clean.
Wear your hearing protection!!!!! Even if your ears are as bad as mine, you've gotta preserve what's left!
Well we don't rent pigs and I figure it's better to say it right out front because a man that does like to rent pigs is... he's hard to stop - Gus McCrae