recommendation for barrel re-crown

[7075-T7]

That's the beauty of using a round head - you can't really mess it up as long as you press inwards against the muzzle; I just keep it as close as possible.

I have heard of some folks using a regular round glass marble dipped in abrasive and just twist it around against the muzzle using their fingers for a half hour or so.

Good point. Where did you get the compound? Just any old autoparts store?

I could use toothpaste, then my barrel will have good breath and be protected from gingivitis for 24 hours

[7075-T7]

Sure - I used normal valve-grinding compound, although you can use any abrasive. You could finish up by wiping off the old abrasive thoroughly and use Brasso, Flitz, whatever on the bolt or marble to give it a mirror shine; it's very attractive that way.

It has to be said, though, that it's important that the muzzle itself be square to the length of its axis - I doubt that this would be an issue with a factory barrel (usually only ones which have been cut shorter) but I wanted to make a note of that fact.

Well, I found an old brass rounded bolt (with flat head slot) and wen't to work with brasso. It definately looks better (and the bolt is mighty shiny too) and under 10x magnification the rifling edges are much sharper, though it looks like SIG didn't do a good job with the rifling itself, though I might be overly picky at 10x.

Thanks for the help, and I'll post the range results.

[7075-T7]

I took my re-crowned P238 to the range and I think it has made it a little more accurate, or at least not LESS accurate. It's not terribly accurate to begin with but it'll shoot minute of zombie at 7yds. 3"ish inches with 6 rounds of range ammo off hand. Thanks for the help AndyC, saved me some hard earned cash!