Stats for Hornady 390 HB-HP 54 cal
04-29-2008 | 06:43 PM
#1
Thread Starter
Typical Buck
Joined: Feb 2003
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Stats for Hornady 390 HB-HP 54 cal
Anyone have a guess at the BC of this (no longer being made) bullet and the FPS using 80 grains of Goex FF?
I was going to use BC of .18 and FPS of 1500 which gives a POI of +1.7 at 50 yds. for a 100 yd. zero. I thought I would use a laser bore sighter to set the factory supplied open sights for initial POA.
I was going to use BC of .18 and FPS of 1500 which gives a POI of +1.7 at 50 yds. for a 100 yd. zero. I thought I would use a laser bore sighter to set the factory supplied open sights for initial POA.
04-29-2008 | 07:17 PM
#2
Nontypical Buck
Joined: Aug 2005
Posts: 1,081
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From: New Mexico
RE: Stats for Hornady 390 HB-HP 54 cal
Those estimates should be pretty close although the BC may be a bit low. Using your 1500fps and varying the BC up and down from .14 to .22 only makes about a quarter inch difference at 50 yards so if your BC is a little off it won't make that big a difference. Varying the velocity by +/- 150 makes about an inch difference at 50 yards, still not a big difference. Sounds like you should be close enough to start and can fine tune from there.
