kip270 Posted March 28, 2007 Report Share Posted March 28, 2007 Hi Guy's, anyone know the BC of CCI 20grn TNT, i have looked at the CCI site, but nothing about BC, looked at Federal site and a 17grn has a BC of .110. I am making up some ballistic charts, and while having a quick look the best range to zero is 125 yards, will have to wait and see Cheers Quote Link to comment Share on other sites More sharing options...
bennyblanco Posted March 28, 2007 Report Share Posted March 28, 2007 Hi Guy's, anyone know the BC of CCI 20grn TNT, i have looked at the CCI site, but nothing about BC, looked at Federal site and a 17grn has a BC of .110.I am making up some ballistic charts, and while having a quick look the best range to zero is 125 yards, will have to wait and see Cheers i have found that 0.123-0.125 is pretty much right for the ballistic coefficient for the 17g the 20g is supposed to be 0.1253 hth mh Quote Link to comment Share on other sites More sharing options...
Peter_HMR Posted March 28, 2007 Report Share Posted March 28, 2007 Lots of drop charts on here this chap is saying .1253 as well http://www.varmintal.com/17hmr.htm Quote Link to comment Share on other sites More sharing options...
kip270 Posted March 28, 2007 Author Report Share Posted March 28, 2007 Thanks guy's Quote Link to comment Share on other sites More sharing options...
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