surface polish is only one factor, bore consistency in how straight everything was when it was bored out is a pretty big part of precison. Stainless barrels are simply less maintenance. Prommy barrels will beat every other stainless barrel on the market given they are down to 1 micron bore variance. You aren't going to see that in a brass barrel.
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I futz with V2s, V3s and V6s. I could be wrong... but probably, most likely not, as far as I know.
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