10mm oal

[KYregular]

just got my new Springfield xdm elite in 10mm and like a good boy was doing the plunk test. most loads give an oal of 1.260 particularly for the 180 xtps I'm going to try. not only did it pass the plunk test at that length, but like I always like to test knowing springfields tend to be kinda tight I tried it at 1.30 and it still passed. seems long to me, anyone have any info as to why the 10mm might have such a long lead? sure not like my czs

 

[sparkyv]

My CZs have the tightest chambers of all my firearms...and my two XDM-10s some of the most generous, and they are marketed as "match" barrels. Full disclosure, I have no Glucks. I'd bet that you'd be able to go out farther than 1.30 with those XTPs KYregular. Mine headspaces at 1.412". Crazy! If you load 'em long, just make sure they fit in your mags, otherwise all's you got is a single shot semi-auto!

 

[KYregular]

My CZs have the tightest chambers of all my firearms...and my two XDM-10s some of the most generous, and they are marketed as "match" barrels. Full disclosure, I have no Glucks. I'd bet that you'd be able to go out farther than 1.30 with those XTPs KYregular. If you load 'em long, just make sure they fit in your mags, otherwise all's you got is a single shot semi-auto!

Yeah, CZs are tight, just got tired of waiting on a 10mm from them, still my favorites though. probably stick to book length at first.

 

[41 Mag]

I normally start at the max mag length and go from there. Then I go for a chamber and then a function test which usually results in a bit of deeper seating. Usually I have found the profile of HP's to be the deciding factor. The larger diameter of the ogive but shorter OAL typically of the bullets will give a longer cartridge length than expected but can start to hit the leade of the throat sooner.

I do have a couple of Glocks but have replaced the barrels with KKM. I found that the difference between the two, and the loads I like to hunt with was significant enough to justify it. The KKM are a bit more finicky with regard to the diameter of the mouth on a HP, especially a couple of the ones I cast. Factory types like the XTP or Gold Dot though feed like poop through a goose.

 

[JDeere]

1.260 is where I am at with my X-Ten and 2.0 4.6 inch. I am using 180 coated bullets for range time and I find if run them through the fcd they run and plunk much better...

 

[crestoncowboy]

I found 15 years ago that a longer than book oal was necessary for my hunting delta and my Kimber. My Glocks, Smith, and bren ten didn't care either way.

 

[chevrofreak]

I bought my Glock 40 first, and started at 1.260", even with my pulled 180gr HST, but when I got my SIG P320 XTen that OAL caused the bullets to drag on the magazine catch notches on each side of the magazine, forcing me to seat to 1.250". Make sure whatever OAL you settle on will fit in your magazines, and keep in mind any potential future acquisitions.

 

[rfwobbly]

► All Max OAL barrel testing results are a product of 2 items: how the chamber and freebore have been cut, and the shape of the bullet.
At the maximum permissible OAL, the bullet can foul the barrel in basically 2 ways: on the ogive, and at the shoulder. See the cartoon below...



The XTP, which brings the full bullet diameter out to a sharp shoulder, generally fouls on the shoulder, as per the LH example in the cartoon.

► It's important to remember that the barrel testing results only define the Max OAL, not the OAL you want to use. This because SAAMI defines the Min OAL at 1.240". This leaves you with an OAL Range, and you are free to choose any OAL within that permissible range. (See the SAAMI Specs.)

► Lastly, the OAL listed in your load manual is part of their Testing Report. It is NOT a recommended or suggested OAL. If that listed number falls within the Max & Min OAL range of your testing, then you are certainly free to use the listed OAL... but it is not a recommendation.

Hope this helps.
.

 

[Palladan44]

I've used book recommended data to the -T
and haven't had any problems. Somewhere in the 1.250 -1.260" range they usually all are.

 

[KYregular]

thanks for the great info, gonna start out with 1.260 with power pistol, be86, and unique. have some sport pistol but don't think that's right for 10mm. yes, I am a huge fan of alliant powders for pistol loads, especially be86

 

[KYregular]

► All Max OAL barrel testing results are a product of 2 items: how the chamber and freebore have been cut, and the shape of the bullet.
At the maximum permissible OAL, the bullet can foul the barrel in basically 2 ways: on the ogive, and at the shoulder. See the cartoon below...

View attachment 1158574

The XTP, which brings the full bullet diameter out to a sharp shoulder, generally fouls on the shoulder, as per the LH example in the cartoon.

► It's important to remember that the barrel testing results only define the Max OAL, not the OAL you want to use. This because SAAMI defines the Min OAL at 1.240". This leaves you with an OAL Range, and you are free to choose any OAL within that permissible range. (See the SAAMI Specs.)

► Lastly, the OAL listed in your load manual is part of their Testing Report. It is NOT a recommended or suggested OAL. If that listed number falls within the Max & Min OAL range of your testing, then you are certainly free to use the listed OAL... but it is not a recommendation.

Hope this helps.
.

spot on info, thanks

 

[TEXASJD]

My G20s and 1911s I have built have not been picky the Glocks will eat anything

 

[chevrofreak]

thanks for the great info, gonna start out with 1.260 with power pistol, be86, and unique. have some sport pistol but don't think that's right for 10mm. yes, I am a huge fan of alliant powders for pistol loads, especially be86

BE-86 is one of my favorite powders. I like it a lot in 10mm, because I get the same velocity as Longshot but less felt recoil.

 

[Lennyjoe]

Be careful going too long as you’ll run into issues with the magazines. I tried a 200 gr Nosler load at 1.275 and they hung up in the magazine