Re: Larue Tactical OSR?
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Outsydlooknin75</div><div class="ubbcode-body">
M118lr is reported to have a MV of 2600fps. Now I am not sure what length, twist or how many grooves that barrel has that they test fired the round in to get the velocity, but I am sure its on record somewhere. In the little email that ML posted it says that Mr Coker was shooting M118lr, so that is why I am curious as to how he got the velocity needed to keep that 175 grain bullet super sonic at that distance. I think that is a hell of a feat of engineering.
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The above quote is what just confuses me in regards to old time ballistic myths.
1. In todays modern world why must we still believe that a bullet knows to go unstable once it is no longer at supersonic speeds?
2. Why must we still believe that the only things that need to be accounted for to achieve accurate stability is bullet weight and MV combined with proper twist rate?
3. Why must we follow the "twist" guidelines that are NOT setup for providing stabilization at the transition range?
4. Why do we still feel that the maximum effective range of a system is the super sonic distance when that has been proven over and over again NOT to be the case?
5. Why must we feel that there are no way for rifles to have significantly higher MV than what that "ammo" is suppose to get even though it has way way short barrel?
Examples:
1. 250gr Scenar fired from factory TRG42 with "that twist rate too slow for anything" has been proven to be stable at 2000m. Yep thats way past its transition range!!! If memory serves me correctly that is about 400m past the point it is supersonic.
2. Canadian Sniper Rob with that infamous 2500yd(something close to that) hit in Afghan with his 50BMG. Yep thats way way past its transition range no matter if he used the 750gr Amax or ANY of the other ammo!! If memory serves me correctly here too, that is about 900yd past the point it is supersonic.
3. I am in process of building a 21" barreled 375/408 to demonstrate that twist rate, lands and groove ratio, MV and bullet weight when tweaked to work TOGETHER that I can still achieve 2400m ranges even though the normal 375/408 has a 30" barrel
4. All the numerous other threads on here that show people have the ability to educate their bullets into not being unstable once it goes subsonic
Thanks