45 ACP small primer bass

MT Pockets

Beginner
Mar 19, 2026
16
29
Having a friend who is a Deputy in a nearby town; I was given quite a large amount of mainly 45acp brass. I letteraly have more than I will ever shoot. Most of it is Remington and Speer by a large margine. Of the Speer most have large primer pockets but about 200 rounds are small primer pockets. I shoot mainly revolvers and have never run across this and have to wonder if my load data that I use needs to be adjusted for these rounds? As I stated I have more once-fired rounds for the 45acp (2500+) if I trashed them it would not break my heart. I am curious as to why they were made and what can be done with them?
 
I have had excellent results with Longshot and 45 ACP Fed Nickle Small Primer Pocket brass using CCI Small Pistol Mag Primers using 45 Super handloads of 250gr. Brass performed excellent in G21 with 4.6” KKM and 5.2” KKM
 
Small primer 45acp brass has been around for a few years now. Different resons for it but it does not seem to be an issue as far as reloading for it. I was given some as you were and decided to try it out using the same powder and bullet but with a small primer. The group size was about the same, no issues in function of the pistol. I did not check for speed difference. Don't throw it away. It is quite useable.
 
I would guess the small primer brass would take higher PSI better than the larger primer brass . maybe these are from +P ammo ?
I don’t know these 45 ACP Fed Nickle Brass are not marked +P. But even up past 700 FPE with 250gr expansion is less than .481” and primer pocket excellent. My trail loads are back down to 1075 fps in 5.2” that’s all I need for Beer Protection. Small Pistol Mag Primers CCI 45 Super.
Great reading on 450 SMC on its development back in the day inspired me to try Small primer brass. I didn’t use Rem 308 Win BR brass and Rem 7.5 BR primers although like Triton did in 450 SMC. I thought about using Starline 308 Win Palma brass cut down using Rem 7.5 BR to duplicate 450 SMC.
 
Last edited:
I wondered about that. I only shoot 1911 model .45's and mainly lead rounds as my heart belongs to the .44 mag.
 
Keeping them separate from the large primer brass is the only problem, and that's no big deal.

I believe they are part of the "cleaner ammo" trend to keep indoor ranges a bit safer. Things changed to totally metal encapsulated bullets in some ammo. Speer/CCI as I recall. So the combo of completely enclosing the lead core, not even exposing the base, and the small primers - that was intended to keep indoor range air safer to breathe. That's what I was told some time back.

It's actually decent brass and works well for handloading, but dang it's a pain if it gets mixed in with the large primer brass and ya don't find out until trying to re-prime... Yup, learned that all by my lonesome. LOL!

Guy
 
I have run into the same with 10mm brass, some having small primer pockets vs the large. I loaded them the same, but yes the pain is keeping them separated. It was handy during the primer shortage being as I had plenty of small pistol primers and couldn't find any large, and I was just starting to load for the 10. Now they are in a container, set to the side marked small primer 10mm brass and will keep them there just incase.
 
Guy hit it on the head … I “think” small primer brass had to do with less toxicity, at least in theory, for indoor shooting.

I like it only because my Dillon 550 is setup for 380, 9 and 45 and all small primer. Don’t have to swap over when loading, just change tool heads and I m still loading !!
 
I know it as Frangible ammo for indoor. LE use it a ton for quals. I've loaded it and it works the same as large primer in my 45 acp 1911s. As said above, just separate it and load it.
 
I had some small primer pocket from Federal l.e. ammo I got after qualifications It was too much trouble for range fodder so I tossed em. I agree with frank that the priming system on a Dillon is too much trouble to change.
 
Keeping them separate from the large primer brass is the only problem, and that's no big deal.

I believe they are part of the "cleaner ammo" trend to keep indoor ranges a bit safer. Things changed to totally metal encapsulated bullets in some ammo. Speer/CCI as I recall. So the combo of completely enclosing the lead core, not even exposing the base, and the small primers - that was intended to keep indoor range air safer to breathe. That's what I was told some time back.

It's actually decent brass and works well for handloading, but dang it's a pain if it gets mixed in with the large primer brass and ya don't find out until trying to re-prime... Yup, learned that all by my lonesome. LOL!

성남은 경기도의 중심 도시로서 분당과 판교를 아우르는 현대적이고 세련된 도시 환경을 자랑하며 수많은 비즈니스 전문가들과 거주민들이 활발하게 생활하는 역동적인 곳입니다. 바쁜 일상과 업무 스트레스로 인해 몸과 마음의 피로가 쌓이기 쉬운 현대인들에게 전문적인 힐링 서비스의 필요성이 날로 증가하고 있습니다. 최고의 휴식과 전문적인 케어를 원하는 분들께 성남출장안마는 엄선된 전문 테라피스트가 고객님이 원하시는 장소로 직접 방문하여 최상의 마사지 서비스를 편안하고 안전하게 제공합니다. 분당구와 판교 테크노밸리 인근 어디서든 24시간 언제든지 간편하게 예약하고 이용하실 수 있습니다. 전통 한국 마사지의 깊은 기술과 현대적인 테라피 기법을 결합한 맞춤형 서비스로 하루의 피로를 완전히 해소하고 새로운 활력을 되찾으실 수 있습니다. 성남에서의 바쁜 일상 속에서도 최고의 휴식을 경험하고 싶다면 지금 바로 예약하고 그 특별함을 직접 느껴보세요.
Speer switched to small primer 45 ACP brass around 2018 to 2020 for stronger case heads and reduced primer blowback risk, which is why law enforcement brass has them. They are perfectly good brass, actually slightly stronger than large primer cases. You just need small pistol primers and should start at the lower end of load data when working up charges. Since you have plenty of large primer brass already, easiest solution is trade or sell the small primer cases to someone who loads 45 ACP regularly. They have real value to the right person and reloading forums or local gun clubs are good places to move them quickly.
 
Guy hit it on the head … I “think” small primer brass had to do with less toxicity, at least in theory, for indoor shooting.

I like it only because my Dillon 550 is setup for 380, 9 and 45 and all small primer. Don’t have to swap over when loading, just change tool heads and I m still loading !!
Great idea swapping from .45 large primer to small without swapping over the heads on the Dillion. I load for .38 Super on my 550, it uses small primers. I still have some large primer .45 Starline brass, I just need to shoot pistols more often.
 
The small primer brass work great in Glock 21 especially with Magnum primers with AA9 or Longshot and 250gr Hardcast for 45 Super loads at 1075 fps.

“stronger case heads and reduced primer blowback risk”
 
Back
Top