You can never have too much gun. I’ve wanted to build a 300 in a semi but always afraid of shelling the barrel from heat.

the about the same as 30-30 comes with several caveats

first that you are running run of the mill Remingtion green and yellow box 150gr which claim 2390fps on the box but from a 16 inch trapper rifle are more like 2150 fps and a bc of 0.200 so now you are right down in 300bo territory your still 40 grains heavier at 100 yards your now looking at 1047fpe and 1773 fps

and second that your running a good bullet in 300 blackout with a 0.290bc and running near max velocity for 300bo of say 2300fps mv the high end of book in a 110gr for 300bo is 2474

running a .290 110 at 2300 you have at 100 yards 1001fpe and 2024fps
running a .200 150 at 2150 you have at 100 yards 1047fpe and 1773fps

this is where they are about the same

at 200 yards

2150fps mv .200bc is 699fpe and 1449fps
2300fps mv .290bc is 765fpe and 1770fps

if you hand load a higher BC bullet or buy a more premium ammunition the 30-30 clearly has the case capacity to do more than 300bo

but there are a lot more 100 year old 30-30s than there are 10 year old 300 blackouts 300 can run 60K psi where manufacturers keep factory 30-30 ammo on the very safe side of 35K psi

so given those caveats they are about the same

and work even if they could both be better .

When you consider what the 300blk was designed to do, replace pistol caliber carbines like a mp5 for tactical applications its an amazing round. It was designed to shoot heavy subs from a suppressed short barreled rifle while clearing buildings. When compared to a 9mm carbine then the 300 blk seems like a powerhouse. The problem comes when we try to make it do things it wasnt designed for, like hunting beyond short range targets. It can still get the job done but it doesnt shine compared to any normal full power round normally used for hunting.

300 black out was never really intended to be the answer to a deer and hog hunting round but people found out how it could be used as such with limitations.


300 was really the answer to the MP5 or more specifically 9mm sub sonic suppressed SBR and Pistol caliber carbines.

147gr at sub sonic was even running +p only is only about 300 FPE

a 220gr bullet propelled at 1050 is running 530 FPE something seen as a significant enough increase paired with low velocity expanding bullets to be effective

the suppressed 9mm had been the go to entry gun for drug labs the agents wanted to avoid shooting if possible but if they had too running a suppressed gun with flash suppressant powder they could shoot as safely as possible in a hazardous environment filled with chemical concoctions and flammable liquids used in the processing and manufacture of drugs.

why reinvent the hole gun when all you need is a barrel change already having mags that work reliably a gun that feeds reliably and it has the exact same manual of arms they are already trained on.

well we are thinking on the same wave length today because I typed my post without having seen yours.

haha i think we are on the same page on the 300blk.

Well I think most of us here don't have storming into crack labs on their list of favorite pass times or even regular out of season activity with the kids. So in our world of hunting etc. There are better options all around weather one wants it for a AR15 platform or bolt gun.

Here is an article about the 350 legend ....... another hyped up round with nothing to back it up

https://www.chuckhawks.com/win_350_legend.html

the 458 socom , 450 Beowulf , 350 legend i think there is a 358 out there they have their place in fitting into a narrow definition of pistol caliber carbine for states that have dropped their shotgun only and allow PCC in strait walled cases.

make stupid rules and people will make creative ways around them.

The 458 SOCOM is a bottle neck cartridge. All be it a bit of a dumpy bottle. The 450 Bushmaster fits into that. And the 500 Beowolf as well but I don't think that any pistols are chambered in any of them.
The thing they did with the above cartridges though is to increase the case volume, so you can actually shoot the larger projectiles at decent speeds. Not so the legend as it is just a 223 case necked up to 35 caliber. and that again s its downfall as a hunting cartridge. I put 40 grains of powder behind a 300 grain projectile in my SOCOM. in an AR15 rifle. Thats enough to fill 3 cases of 300 BO using a projectile half the weight

I don't know about drug lab agents, but the reason suppressed 9mm where used for hostage rescue and COB inside homes was due to the fact that the 9mm rounds would not go through walls like the 5.56. The reason it was suppressed was to try not to disturb and scare children and others.
The MP5, Sig, CZ and CMMG Banshee in the 9mm and suppressed make an awesome home defense gun.



[the suppressed 9mm had been the go to entry gun for drug labs the agents wanted to avoid shooting if possible but if they had too running a suppressed gun with flash suppressant powder they could shoot as safely as possible in a hazardous environment filled with chemical concoctions and flammable liquids used in the processing and manufacture of drugs.

why reinvent the hole gun when all you need is a barrel change already having mags that work reliably a gun that feeds reliably and it has the exact same manual of arms they are already trained on. [/quote]

9mm has nearly the same amount of over penetration as fragmenting 223 through walls both do a good job of stopping in people targets but the 223 makes an incredible energy dump.
however the pressure wave and noise in a confined space is ugly.

300bo nearly doubles the energy of 9mm while not really changing the noise or over penetration much.

some of our local multi state drug task-force officers are now running the 300 in a suppressed SBR the one I was talking to at the range liked the 300 over the 9mm but it could be their personal preference.

Nope, 9mm is not only much safer, as the AR will through bodies through walls.

https://www.youtube.com/watch?v=fiAQT96j2ZY

this is SO hugely ammo dependent.

in your video link they used 77gr black hills ,that is a match ammunition not intended to expand , I agree you will get great penetration.

but that is why I say so hugely ammo dependent. if you use something like Hornady TAP 55gr Urban the results will likely be different



there are also better and worse 9mm ammo for over penetration although most 9mm personal defense ammunition doesn't leave the body or leave with a lot of energy . however on a miss many still punch a number of drywall walls

I tried some 147gr Ranger LE 9mm recently , it might have well as been fmj for it's effectiveness on animal targets and I went back to my 124gr load that gives me the effect I am looking for.