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Old 01-16-2013, 03:21 AM
bowfisher bowfisher is offline
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Join Date: Jan 2011
Location: Iowa
Posts: 820
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A search here could bring up lots of good data, no expert but I'll give you my 2 cents.

Number one, either one is a much better choice than the 204R , just on a brass basis alone.

Two, I have both and there is no real performance difference that can be measured in the field. Few fps at best....20Tac=20Prac=204R.

Last, all of mine perform very well, not a huge fan of the shorter neck and shallow shoulder on the 20Prac, but mine shoots a ragged hole at 200yds. Hard to argue with that. 20Prac just entails a 223 S die with appropriate bushings for desired neck tension.
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