07-29-2015, 09:03 AM
sneaky one Wrote:Klem, could you reiterate , and ?? the last paragraph for all?
So, slow speed is worse than High speed on flesh, ? That's what I thought when I went to higher speed GMX pills.
Actually the last sentence. No reason--- to go 300blk
What was the true meaning there?
Geez, nobody wants the epilepsy tag.
I'm not pee ing on any caliber, just would like all things clearly defined for all. Thanks man.
My comments relate to 52's comments regarding subsonic suppressed being less damaging on the ears during CQB training than supersonic. Yes it is, but that is no reason to adopt it an operational calibre.
My thoughts also relate to my experience with this calibre. I have more experience with 300BLK than 65Gr having used it since they first came out. If you run subsonic 300BLK simulations on Quickload you will see that the peak pressure is only 2/3 the available before being deemed over-pressure or dangerous. Most loading is done at pressures approaching maximum whereas 300BLK subsonic loads are much tamer than the calibre is capable of. If you load more powder the rounds become supersonic. If you look for heavier projectiles (than 240gr) it becomes problematic because they are too long to load and/or don't exist. It's just physical limitations of lead and mass. I suppose depleted uranium might get you a heavier projectile but... The heaviest off-the-shelf projectile in 30cal is the 240SMK. Load that to highest possible subonic, say 1050fps and there's still 1/3 of the potential chamber/peak unused.
Couple that with the tendency of slow heavy projectiles to overpenetrate and your under-powered load to start with ends up laser beaming through the human target and out the back taking its precious distruptive energy with it. No lateral temporary wound cavity that we see with supersonic imacts. Shot placement becomes far more critical, as does the potential for collateral wounding. Note the recent Lindt Cafe siege in Sydney with one of the hostages killed by a stray 5.56 AR15 ricochet from the rescuers. 300BLK increases the potential for that in a crowded airplane or room.
The roos (kangaroos) I have shot with various subsonic loads all exit/through-and-through whereas supersonic drops them dead on the spot. Half the animals hit with subsonics hop off to die somewhere else. The only round I have found to do anything more than laser beam through is the 220SMK which tumbles through the animal. You hear a slap followed by a zing and the round ricochets off somewhere else. Large roos are a reasonable analogue for humans; same shape and mass of flesh.
There is a bullet that has just hit the street over your way by a new company called Blackoutbullets.com, a 220gr hollow point. I have yet to try them. The dedicated 220 subs by Outlaw State LLC do not expand and LeHigh's 30cal subsonic offerings offerings are too light to guarantee cycling and maximise weight potential. No other company sells or loads subsonic 300BLK rounds for flesh. They use existing match rounds that are great for punching paper only.
SF does not need underpowered firearms with a tendency to over-penetrate. Coupled iwth this is that loaded (SF do not handload their own) ammunition has not kept pace with this new calibre. Off-the-shelf loaded subsonics will not do the tasks justice. 300BLK will be no better for SF work than 9mm subs, which burn less powder and are quieter.
What the Dutch will also appreciate in time is the weight of 300BLK ammunition vs. 223 for no more ability to kill. We are talking about up to 6kg for a 300rds load-out. Once they start carrying that up and down mountains the sexy calibre will wear off pretty quickly. Then figure out that for the same weight of ammo they can carry 7.62 which has more range and ability to kill and they will doubt their decision. The weight of 7.62 and a 300BLK cartridge is almost identical. The majority of a cartridges weight is in the projectile, not in difference between powder and cases. Coupled with that is the rainbow trajectory of both supersonic and subsonic BLK's compared to a flatter shooting 223 and they suddenly realise they are getting more misses and have to focus more on range estimation. Their max point blank range zeros are now shorter than 223 which means less lethality.
But, the 300BLK can do two things with its main utility being subsonic. Maybe they can keep their 223's and one or two guys with 300 uppers in the pack and with some sub ammo in case they need it for shrinkage.