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How much velocity is lost using a 1/10 vs 1/11 barrel?

1284 Views 4 Replies 4 Participants Last post by  ArtFWTx, 
T
I'm new to the 6.8 as I just purchased my first upper which should be here today. It's a RRA 16 inch with a 1/10 twist rate. It is SAAMI II, so I'm okay in that respect. Anyway, after reading some info on this forum I've learned that the 1/10 barrel builds up unnecessary pressure causing lower than possible velocities. Exactly how much velocity is lost by using a 1/10 with 6 grooves compaired to the 1/11 with 4 grooves? I hope I have my numbers correct. I plan on starting out with the 110 SSA pro-hunters if that helps as a comparision. Thanks!!
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ArtFWTx
http://m.b5z.net/i/u/6132121/i/6.8_20SPC_20Performance_20Testing_20Report_1_.pdf

Here's the report that goes over the different specifications.
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