Any opinions on 147gr vs 124gr+P? There's a thread in Billy Bob's section about Speer 147gr at a good price, but I don't understand why 147gr is popular. Comparing Speer-to-Speer, their 147gr generates 326 pounds energy at the muzzle, while their 124gr +P puts out over 400 pounds.

Why would you want the 147gr over the 124gr+P? Seems to me, if you compare knock-down power, the 124gr should be better. Is the 147 better against barriers? Better penetration?

I’d guess penetration. Lighter bullets traveling faster lose velocity faster in tissue and don’t penetrate as deeply. Also, recoil is most likely less with the 147 grain.

But the lighter bullet has nearly 100 pounds more energy to start with, so I'm not sure. I should look for a Youtube video, maybe somebody already did a comparison test. I prefer answers here on SigForum, I trust them more, though.

Thanks for the reply.

Lucky Gunner did a comparison test:

https://www.luckygunner.com/la...ballistic-tests/#9mm

As far as ballistic gelatin, there was little difference between the two or any of the other Gold Dot models. I've read that heavier bullets carry more momentum and therefore are better for shooting through barriers.

Thanks for that Lucky Gunner link, iron chef, I'll read it tonight. There were no Youtube videos that I could find comparing the two rounds (or any similar rounds by other manufacturers, either).

Ammo Quest/ShootingTheBull is a good one to watch for comparisons, although his emphasis is on performance out of short barrels.





He has a blog too.
https://shootingthebull.net/bl...mmo-test/ammo-quest/

Heavier projectiles tend to penetrate hard barriers better than lightweight projectiles that are traveling faster.

Additionally since the 147 grain projectiles are subsonic they suppress better than the 124 +Ps