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Discussion Starter · #1 ·
I've got a A1 that I'm thinking about upgrading to the TBM system. Question - are the mags the same size as the 4 rounder DBMs in terms of cartridge COL allowance? I've looked everywhere and can't find an answer to this.

It would be nice if I could seat bullets a little longer, rather than be limited to 2.8"
 

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Discussion Starter · #5 ·
Ok great thanks. I just ordered the TBM system through Midway with a spare 10 rounder. I've been getting by with two loads - a 2.800 COL 168gr that fits my current 4 round DBM, and a 2.950 COL 178gr long range/accuracy round that I single load.

I am going to run an OCW at 2.85 with the 178s and see where that gets me.
 
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