triggersqueezer Posted December 5, 2012 Report Share Posted December 5, 2012 does any one know how to change the bc from g1 to g7 on exbal version 8.0? Link to comment Share on other sites More sharing options...
andybrock Posted December 6, 2012 Report Share Posted December 6, 2012 does any one know how to change the bc from g1 to g7 on exbal version 8.0? It automatically changes with bullet selection I think? Andy Link to comment Share on other sites More sharing options...
triggersqueezer Posted December 7, 2012 Author Report Share Posted December 7, 2012 cheers andy i have gremlins in exbal at the moment so can't check.will do as soon as i sort it. Link to comment Share on other sites More sharing options...
gbal Posted December 7, 2012 Report Share Posted December 7, 2012 It automatically changes with bullet selection I think? Andy I don't use Exbal,but 'automatic' here raises an eyebrow-I may well be wrong,but how does the program know-other than using the makers quoted BC value-and that isn't typically standard across makers,or even specified as G1 or something more accurate.It might tell you thge BC value,,I suppose-and sometimes the differences are so large that its clear which system has been used-but I'd be checking the output 'predictions' against reality-which you would do anyhow,given the more limited accuracy of quoted BCs-three decimal places can seem like precision,but it's better to see them as comparative only with other BCs using the same system-eg in all the sierra match kings. BC can stand for Be Consistent. george Link to comment Share on other sites More sharing options...
triggersqueezer Posted December 7, 2012 Author Report Share Posted December 7, 2012 thanks george its only lapua and berger that qoute g7,to be honest the g1 seems bob on out to 400yds.i don't often shoot further but just fancied looking at the difference. Link to comment Share on other sites More sharing options...
gbal Posted December 8, 2012 Report Share Posted December 8, 2012 thanks george its only lapua and berger that qoute g7,to be honest the g1 seems bob on out to 400yds.i don't often shoot further but just fancied looking at the difference. OK.G1 is pretty crude in itself (cylinder with rounded nose shapae assumed!),but as long as comparisons are with other G1 BCs,it's not unworkable over short distances.As ever,you have to check with the reality of your load/rifle package,as you say.Lapua and Berger are a bit more savvy,or know their customers are,so use G7.Sierra might have for the Match king,but then would look inconsistewnt for G1 on their hunting bullets-where construction far outweighs BC decimals over 200 yards. I don't know if exbal etc adapt easily-but looking at all this is what we do on cold days in the winter-it's interesting,especially with a copy of Litz "very advanced ballistic theory,and it's assumptions"!! george Link to comment Share on other sites More sharing options...
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