I'm with Kirby , 2 miles is a long poke for a shoulder fired weapon of any caliber. Not saying that it can't be one , I'm sure that their are things that are certainly considered "other worldly" that happen everyday.
I'm not sure if its the bullets problem that is causeing the crazy accuracy drop off. I have heard for guys thats oppinion and word meen alot to me say that their are shoots where the 220 and 240 Sierra Match King fired out of a 308 and 300 winchester shoot to 2000yds , I'd call total BS on that one but these boys swear it happens.
I have also personaly seen some big black powder rounds like the 45-120 and 50-120 shoot out to 1600 yds and those bullets are starting out WAY slower and have half the BC that the SMK does. I think that its realy just an mystery with some guns. I also have a 9mm upper for my AR here that will group in the 6" range at 200yds (with a higher power scope) both with supersonic and sub sonic rounds , I figured that it would pattern in yds rather than group at all.
BUT , I do find it strange that he is shooting the same bullets out of guns built very well I assume and he is having no troubles.
Maybe he is shooting them out of a 30 cal barrel in turn streaching the bullet way out making it more spear like than before , maybe with a BC of 1.9 !!:p
I have witnessed blackpowder rifles do amazing things at long range but this is for a very specific reason, the bullets they use perform very well at long range and generally, they are relatively short and stubby with flat base designs. Also, very rarely are they fired at velocities much over super sonic velocity.
Short fat bullets have been proven to hold accuracy and consistancy much better through the trans sonic phase much better then long, sharp ogive, boattail match bullets.
A VLD type bullet that is fired just under super sonic velocity is extremely efficent and accurate over very long ranges but I have yet to see a test where these bullets accuracy drop out of super sonic velocity and remain accurate for 1000 yards past this point in velocity.
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