Well, I didn't even come close
I was going for the ultimate varmint-vaporizer load. as I mentioned above my expectation was for 4200fps.
I was wrong'O on this one....... even with a 31" Krieger and a large tenon BAT I fluffed out at around 4000fps with the 112BIB's.
There is a guy on the web vaporizing dogs and chucks with a 300WSM and claiming 4150fps but I'm skeptical now.
These ARE absolutely killer verminator loads don't get me wrong! Accurate and flippin' FAST but not over 4000 for me. I punched 14 shots using 4 different powders and loading/shooting one at a time....... velocities all over the place.... and had a ragged hole an inch tall and a half-inch wide.
Anyway's.... hadda' report it.
al
Al, based upon experience with my .300WSM barrels, I had to believe that 4100+ was a bit dreamy . . . but, I wasn't going to try poking a hole in your boat!
RG
P.S. I forgot - since the BCs posted on the BIB webpage (
www.bibullets.com) are all of the G1 sort, thus vary somewhat with velocity, when you get up to 4K FPS , the BIB 112 will have a BC of about .344 - soon, I hope to have all of the
G7 BCs posted - this model is less velocity sensitive - a better 'avareage' for the full 'time-of-flight' potential. Several years ago, Henry Childs, using his Oehler 43 set-up measured the BC of the 112 Gr. BIB FB at .32 - this was over a distance of about 300 Yd., and a MV of about 3K FPS - somewhat surprising, as that is very near the calculated (G1) BC.
Prior to that, the BIB 187 Gr. FB - calculated BC of .54, had been 'measured', at White Sands, NM, via DOPPLER RADAR, to have a (G1) BC, from muzzle to 1K berm, of .525 - not too shabby for a FB bullet. The BIG news then: I was informed that, to that date, the FB bullet had produced the most UNIFORM BC (shot-to-shot) of any bullet measured there!
The point: in the years since, empirical results have demonstrated that, 'REAL WORLD" BC (G1), as calculated via the GREAT programing at JBM Ballistics, tend to be optimistic - to the tune of about 0.015. And, as has become well known, the G1 BCs will vary with velocity. Keep 'em ON the X! RG
