I'm staying away from the 16" barrels though...apparently 9mm reaches its peak velocity somewhere in the 12" barrel length range and, after that, 'drag' from the barrel tends to start slowing the bullet down even before it reaches the muzzle of the barrel.
Using that site I learned a 10" .45acp 200gr+P has as much muzzle energy as a 11" .223 55gr. Now I want a .45ACP SBR thompsonNot according to Ballistics by the inch:
BBTI - Ballistics by the Inch :: 9mm Luger Results
(statement of intent)www.ballisticsbytheinch.com
While one does get most of the velocity gains by 12" of barrel (i.e. the vel starts to level off), seems like most loads continue to rise a bit.
8 of the 10 loads tested by BBI had their max velocity with 16-17" of barrel.
One topped out at 15".
One at 13".
None had their max velocity at 12" of bbl. Although all had achieved at least 92% of their potential velocity by 12", there was still, on average about 3.7% velocity remaining to be squeezed out of the load (15 to 108 fps, or about 52 fps on avg).
But, the handiness of a shorter barrel might outweigh the extra velocity, depending on one's intended use/priorities.
Wow...Using that site I learned a 10" .45acp 200gr+P has as much muzzle energy as a 11" .223 55gr. Now I want a .45ACP SBR Thompson
So when scrolling it’s a partial pic…. When I clicked reply I see the whole thingOkay Dokey...apparently I was seeing a 'whole' photo whereas everyone else was only seeing a 'partial' photo...so here's another shot...hopefully, this one is a full-length (width) pic?
I don't know where you are seeing that, but it's not even close to being true. Average velocity of 55 grain XM193 5.56 is over 2800 fps out of an 11" barrel. That's 957 fpe. You'd have to push a 200 grain bullet a little past 1450 fps to get that kind of energy, and there ain't no .45 ACP cartridge even coming close to doing that out of a 10" barrel.Using that site I learned a 10" .45acp 200gr+P has as much muzzle energy as a 11" .223 55gr. Now I want a .45ACP SBR thompson
I don't know where you are seeing that, but it's not even close to being true. Average velocity of 55 grain XM193 5.56 is over 2800 fps out of an 11" barrel. That's 957 fpe. You'd have to push a 200 grain bullet a little past 1450 fps to get that kind of energy, and there ain't no .45 ACP cartridge even coming close to doing that out of a 10" barrel.
Using that site I learned a 10" .45acp 200gr+P has as much muzzle energy as a 11" .223 55gr. Now I want a .45ACP SBR thompson
I didn't say you were stupid, but you might be colorblind. Look at your .45 ACP chart again. That's not the 200 grain +P load. You're comparing the hottest 165 grain load with the weakest .223 load.I mean I'm a college drop out and obviously pretty stupid but those look pretty damn close to me. Please feel free to correct me or the website.
EDIT: also, your math is a little off. That 10"bbl is pushing 2600fps not 2800.
Are you always so arrogant and condescending? I'm not sure I've seen you post yet that isn't trying to belittle someone or correct people on minute details.I didn't say you were stupid, but you might be colorblind. Look at your .45 ACP chart again. That's not the 200 grain +P load. You're comparing the hottest 165 grain load with the weakest .223 load.
Regardless, I didn't go by the line chart, which is actually imprecise and done quite poorly. I went with the actual figures listed in the velocity charts on that website. Check the exact figures and get back with me.
It's funny how every time I'm right about something, I'm suddenly "arrogant and condescending."Are you always so arrogant and condescending? I'm not sure I've seen you post yet that isn't trying to belittle someone or correct people on minute details.
Can you post a picture of the feed ' ramp' ? I have an original barrel that has feed problems. I had to add a Taccom feed ramp to lower to get it to feed reliably.I have the Aero EPC with 16”bbl. Just got the new barrel from Aero this week. Still need to shoot it. Very handy set up.
Here's a pic of the new 'enhanced' ECP 9mm feed ramp...the original barrel had just a round hole for the chamber throat, not the 'angled' edge around the chamber throat that is visible in this photo.Can you post a picture of the feed ' ramp' ? I have an original barrel that has feed problems. I had to add a Taccom feed ramp to lower to get it to feed reliably.
Thanks
Are you always so arrogant and condescending? I'm not sure I've seen you post yet that isn't trying to belittle someone or correct people on minute details.
$430 for a Ruger PC Carbine 9mm...nice price for Glock / Ruger magazine compatible rifle!My Ruger PC Carbine 9mm has never had one problem. It shoots everything. Russia steel case, and every HP, and weight from 115-147gr reliably.
I don't regret the $430 I paid for it.