6gt

John Glidewell said:

Bullshit!!!! Been wet tumbling with steel pins for years without issue. 223 rem, 6.5 creed, 6 creed, three 6 gts, 22 gt, 25 gt, 7/300 prc, 6.5 prc, 338 edge, 338 lm. Never an issue.

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You may not be seeing it - and if so, good for you. You only have to Google "wet tumble peening case mouths" to find threads here and on a number of other forums. In my friend's case, he stopped wet tumbling, and the problem stopped immediately. The only thing he changed was tumble method. Might have something to do with size of the pins, or time he was tumbling, or the tumbler in use, etc. Even dry tumbling can peen the cases mouths, but it takes a lot longer - wet tumbling involves the cases falling on one another, typically, where they just bump into one another in dry media.

Wet tumble for only around 30 mins.. Don't leave them in there for like an hour. Cases get cleaned and you limit the impact.

Still messing around with RL 15.5. Shot a 1.512” group at 300 the other day so decided to see what it would show at 400yds. Paper don’t lie.

27” 1-8t
RL15.5 @ 34.5g
Berger 108’s
12-13mph wind

John Glidewell said:

Bullshit!!!! Been wet tumbling with steel pins for years without issue. 223 rem, 6.5 creed, 6 creed, three 6 gts, 22 gt, 25 gt, 7/300 prc, 6.5 prc, 338 edge, 338 lm. Never an issue.

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Yep...peening some for sure. Belling a case mouth afterwards in a die like previously stated...um, no, not in my experience...but that doesn't mean its impossible. Issues? No to that either. You'd have to leave that stuff in a tumbler with pins for a long time to create a situation where this is possible.

My biggest gripe with wet tumbling is the time and anxiety of mine that I'm going to send a pin down my barrel at dome point.

I still do it, mostly for pistol now though.

My .308 cases all flare like that after going through an RCBS FL sizer while doing .002 shoulder bump. Just as previously said, the next pass with a mandrel removes the bell. Id guess it just depends on how the die is built?

Wolf762x51 said:

My .308 cases all flare like that after going through an RCBS FL sizer while doing .002 shoulder bump. Just as previously said, the next pass with a mandrel removes the bell. Id guess it just depends on how the die is built?

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I'm trying a different die, whidden. I did think maybe the top of the mouth was touching the retaining nut for the decapping pen. It holds the bushing in. I backed the top out about half a turn so there's a little play in the bushing and nut. Giving that a try with a few cases but I can't tell if it's working or something else is causing it.