10MM PRIMER SHOWDOWN: FEDERAL GOLD MEDAL MATCH:VELOCITY AND GEL TEST

[mr.revolverguy]

Please leave 10MM Alone PLEASE

10MM has come a long way from the days of the Bren Ten. I would even say the past 5 years or so it has seen a strong resurgence. Almost every firearms manufacture is making a 10MM firearm now in 2022. 10MM is my second most favorite cartridge, it can serve a wide spectrum of use cases and for the reloader be loaded from mild to wild.

WHY ARE THEY MESSING WITH PERFECTION?
In a recent trend we have seen ammo manufacturers developing new cartridges which is very exciting. On the flip side of the coin they are also starting to tinker with existing cartridges. With the development of clean cartridges the first to be neutered was the 45ACP switching from large pistol primer to small pistol primer. What has not been explained at least within my research is what exactly makes small pistol primers cleaner. It is my understanding it is the same mixture of materials. Is it just as simple as there is LESS of it in a small pistol primer than there is a large pistol primer? Leave a comment below and let me know your take on this, but I digress. 45ACP was not enough for the first time I started hearing about small pistol primers in 10MM also. I literally convinced myself that this was not true and that I was going to ignore UNTIL. I walked into the local shop and found Federal American Eagle loaded with small pistol primers. Interesting enough nothing on the box indicated these were classified as ?clean loads?. I quickly put those boxes back on the shelf as if it were vudoo in a can or a live rattle snake. So quick that the gentlemen next to me asked if everything was ok and I found myself in a 40minute conversation explaining why I was purchasing the Remington Green and White box 10MM. By the way I know many would say this factory ammo is high end 40S&W loaded ammo anyway. True though I am always looking out for 10MM ammo when the cash is right to add to my 10MM Load Depot the largest 10MM database on the internet.






Video and Complete Review https://dayattherange.com/?p=10235

No paid ads or anything on the site totally free. It's just that there are over 20 pictures and video included in the review.

Let me know what you think oh yeah reply here if you are for leaving perfection ALONE tell the manufacturers we like what we have lol.

[Kenk]

Thanks, unless I?m missing something, why would the ammo manufacturers do this in the first place. Just seems very odd

[mr.revolverguy]

Supposedly cleaner?

I just noticed an additional item. The LPP produces less extreme spread and lower standard deviation in both the Colt and Cimarron

[blaster]

I heard that there are small pistol primers that contain a different environmentally friendly compound. maybe those are the ones labeled "cleaner"?

[Kenk]

So unless it?s way way cleaner using SPP, which is hard to believe that it could be, the negative aspects will likely out weigh anything else, not to mention, the whole thing seems  a little fishy

[Kenk]

Blaster has a good point

[junkie]

I wish they would have left well enough alone. SP .45 is the bane of my reloading world

[N9TKF]

I picked up 10mm range brass about a year ago that were Federal and also SPP.
Is Federal the only company using SPP in 10mm?

[38_Super]

Winchester Super Clean ammo states lead free, including the primer so the compound is totally different than a traditional Lead styphnate based primer.

[mr.revolverguy]

Question is are they killing off 10MM? We all say it is nothing but 40S&W the way they load them. Now they will take those same loads and just swap to small pistol primer and by my results equals even lesser velocity.

[The_Shadow]

Awesome Ranger and testing results!  Thanks for posting!

[Frank500]

Thank you for interesting work. I load the small pocket brass for field use because I hope I lose the stupid things

[SteveinNC]

  Only thing to expand on here that I would like to see isn't a direct 1 to 1 coralation between SPP and LPP and all else being equal.  But what is the max load for a SPP Be-86 load and what is the max for a LPP BE-5 load.   You are probably able to add more powder to the SPP load and possibly make up that difference in velocity loss when you know you are using a small brisance flame primer to begin with.  But will it maintain the same accuracy, etc?  I think this needs to be vetted out before we lable the SPP in 10mm the work of the devil.
  The reason I would like to see this is based on my experience in my past hobbies which was compting in 600 & 1000yd benchrest shooting for many years.  I had a 300 Win Mag Sendero that I was shooting and it shot so well with my hunting load that I decided to take my complete factory rifle and see what it would do at 1000yds for kicks and grins.
  First target out was 14" 5 shot group but the group was only 4-6" wide and the 14" was all up and down.  The load I was using was Fed215 (LRM), 72gr R22, Win Brass, 10gr Nosler BT and seated to just touch the lands.  This load was my hunting rounds so they were FL sized in Reading Type S dies using a .336 button.   So I knew I had to tune out the up/down which is typical for long range loads.   FYI:  This load would cut holes at 100yds shooting 5 shot groups.  The day I sold this rifle I shot two back to back 5 shot groups approx 10min apart.  First one was .520" and second group was .540".  The guy didn't believe me when i told him it was a 1/2 MOA gun.  Cash money on the spot when he saw those 2 groups.
  Back to the topic at hand: So I went back and started tuning.  I dropped back to a Fed210 primer and started bumping the load up and ended up shooting 75gr R22 using the Fed210 primer and 100yd groups were back shooting ragged holes again and velocity was right near the 3020fps I was getting with the 72gr load using Fed215.
  The last group I fired in competition using that new load was 7.4" 5 shot group and a 47 out of 50 score.  I was very happy using a factory gun, Leupold  4-12AO scope, and hunting bullets.
  I have done this when tuning other rifles also, so I have to wonder if using this same thought process, what will a SPP in 10mm give us?  Maybe the SPP is a blessing in disguise, or we run out of case volume and you can't get enough powder in there to make up the difference.  Or the accuracy go to hell in a handbasket.   But I think it worth pursuing.

I've got it on my to-do list.  But we got snow flurries today in NC so not the best weather for load testing right now.  And I dodn't think I have any SPP cases in my possession.

Just my loose thoughts,
Steve

[38-40]

I noticed the other day that the listed velocity for federal American Eagle 10mm is only 30fps faster than 40S&W. 🧐

[sparkyv]

10MM is my second most favorite cartridge,

Curious; what's your favorite cartridge, mr.revolverguy?