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 Competition Shooting and Reloading
 expected velocity question
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kidthatsirish
Advanced Member

USA
6219 Posts

Posted - 01/28/2018 :  5:31:54 PM  Show Profile  Reply with Quote
30-06...168gr ballistic silver tip over 50 grains of varget...

lets say its a typical day at 72degrees F, at sealevel, with a 20 inch barrel....what kind of velocity do you think we are looking at here?

“For once you have tasted flight you will walk the earth with your eyes turned skywards, for there you have been and there you will long to return". -- Leonardo DaVinci 1452-1519

"The rifle itself has no moral stature, since it has no will of its own. Naturally, it may be used by evil men for evil purposes, but there are more good men than evil, and while the latter cannot be persuaded to the path of righteousness by propaganda, they can certainly be corrected by good men with rifles."
Jeff Cooper, The Art of the Rifle

charliemeyer007
Advanced Member

USA
5502 Posts

Posted - 01/28/2018 :  6:43:42 PM  Show Profile  Reply with Quote
The online Hodgdon data says 50.5 gr of Varget under a 168 gr Hornady BTHP in a 24" barrel is 2859 fps with 49,200 CUP. I'd guess about 2700 fps. I haven't ever used Varget so it's just a guess.

http://www.guns.com/2012/02/16/the-myth-of-barrel-length-and-velocity-loss/

Maybe 2800 is a better guess. Rifles are individuals the results can vary quite a bit with a load.

Edited by - charliemeyer007 on 01/28/2018 6:49:34 PM
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MIKE WISKEY
Advanced Member

USA
8673 Posts

Posted - 01/29/2018 :  10:33:16 AM  Show Profile  Reply with Quote
keep in mind that individual rifles can vary considerably from 'published' data. some as much as 20%. (only your coronograph knows for sure)

Edited by - MIKE WISKEY on 01/29/2018 10:34:45 AM
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Ambrose
Senior Member

2370 Posts

Posted - 01/30/2018 :  09:29:35 AM  Show Profile  Reply with Quote
A lot of guess-work involved in this answer, but a guess is what you're asking for, so here goes: I haven't used Varget in .30/06, either but have used a LOT of IMR4895. Hodgdon data indicates the burn rate of IMR4895 & Varget are very similar. I also have some .30/06 short barreled rifles. I do a lot of shooting over chronographs. After checking my notes, my best guess would be 2650 fps or there abouts. I'll check your load in a 20" .30/06 one of these days, but by then your post will have been long gone.
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Mobuck
Advanced Member

10331 Posts

Posted - 02/08/2018 :  07:57:13 AM  Show Profile  Reply with Quote
With "pretty good" self contained chronographs costing around $100, there's really no need for guess work.

Mobuck<BR>
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