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Lets see here, I take a 300 gr Wildcat ULD, drive it to 3050 fps in the 338 Kahn, zero it at say 500 yards, then move up to 250 yards and shoot a group and measure group height and log it, then move out to 1000 yards and shot groups to measure bullet drop below point of impact and then test at 1300 yards as well.
From this I get a prediction of B.C.
Using this B.C. value I develope a drop chart out to 1500 yards which results in the ability to drop a bullet well within 1 moa of the target at any range out to 1500 yards.
THis is more then accurate enough B.C. prediction for me. If it is not for you then I am sorry.....
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Kirby, I don't see where you mention correcting for conditions anywhere. Are you back calculating these BC's back down to what they would be at sea level under standard conditions?
A couple weeks ago, I sent Richard a general inquiry, -Measurements. Richard insisted on sending me 25 or so for testing(his 142.5gr). I was pretty darn impressed with that.
He also asked "if any bullets would be perfect for me, what would they be?". A bullet maker actually asking me what I'd like, weird. Someone in the shooting industry, asking for customer inputs? No way!
Anyway, I get the impression that he's not interested in expanding production quantity. Just satisfying individual customers best he can. In light of that, I suggested a 110gr 6mm ULD/RBBT, and a 130gr 6.5mm in same form. But I realise one man can't just make everything under the sun.
We should help him out.
Maybe poll for most desired(with discussion)on each weight/cal, and negotiate an appropriate group purchase.
Good for Richard, and good for us.
That is a hell of an idea and am sure Richard will go for that. He frequents this board so he will see it.
As Kirby said and you. Richard wants to make his customers happy and will do about anything you want, in reason.
Hell Daivd Tubb went to Sierra and told them the bullet he wanted them to make and was told NO!! So he found another makere to make the bullets and is selling a crap load. Can't keep stock fast enough. TO bad for sierra.
Yes I tweak the load for differing conditions and situations. To be honest, I could care less what my load is doing at sea level, I shoot at 3000 ft and up so it has no practical benefit to me to develope a B.C. model for sea level.
Also, I really do not care what the B.C. for my bullet is. I want to learn my bullets trajectory. Getting in idea for B.C. just gets me a starting point where I can build off from from there. THen it is on to field testing on actual targets at actual ranges.
I do not generally trust what a computer tells me the trajectory will be, I prove it to myself by watching exactly what the bullet actually does over range.
Time and time again, the Wildcats drop significantly less then the Sierra Matchkings. THis is all I am reporting. To me, in some way, this would tend to mean that they have a higher B.C. value then the SMK.
Now I know this is not scientific testing. Hell why don't we all jsut pool our money and get a doppler radar so we can do some real extreme range testing!!!
I'll throw the first $5.00 in [img]/ubbthreads/images/graemlins/grin.gif[/img]!!
Allen Precision Shooting
Home of the Allen Magnum, Allen Xpress and Allen Tactical Wildcats and the Painkiller Muzzle brakes.
I measured the 11 300 uld's that i had. I took 4 measuremants for each bullet to see how consistant i was being and weighed each one.
Doesn't seem too much of a variance to me but i have never sorted bullets before so i don't know and these were only 11 bullets. I just look at my target but am starting to get more in depth with my reloading.
For me it would seem more logical to sort bearing length as that is what contacts the lands but i don't have a second stoney point tool. Might have to get one. Your milage might vary from mine so take it for what's it worth.