If I shoot hot .357 loads in my 686, it produces a little flame cutting in the topstrap, but it appears to be self-limiting.

If I fire my .38 +P range loads in the same gun, it tends to leave a carbon deposit in the same place.

There were some short-lived cartridges like the .357 maximum that tended to produce significant top strap cutting in revolvers, but the single-shot guys swear by them.

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Science plus Art