10mm 'original' data

[JonB]

Hi all,

I was reading an article about 10mm and it mentioned the original 'high test' loads that were made when the round was introduced. I am guessing most of the data out there for reloading doesn't compare to the original specs. But that got me curious as to what the original 10mm load was?

 

[ReloaderFred]

The original loading from Norma was a 200 grain jacketed bullet at an honest 1,200 fps. That can still be acheived, but approach with caution and use new brass.

Hope this helps.

Fred

 

[jfh]

I still have some of the original Norma ammo. I fired one magazine of it in my then-newer (broken-in) SA Omega / 6" ported. The Peters Stahl top end has a slow unlock time; it was awesome--and the extractions were slightly sticky.

Over on handloads.com there is a thread about some new handloads--now typically running the 180 bullets, IIRC. The results say the load is overmax, but the shooter is still feeling his way around 10mm and reports no undue pressure signs--yet.

That's why primer reading is a bit like reating goat entrails: If the same WLP I use in a normal max (call it 20,000) 45ACP round is also used in a max (call it 36,000) 10mm round, which primer will look overpressure?

Jim H.

 

[JonB]

Cool. thanks.

I'll probably stick to my handloads for 10mm.

165gr Speer GDHP over 11.2gr AA#7 1177fps according to speer #14 manual
180gr Ranier plated 180's over 10.3 AA#7 (around 1100? Accurate say 9.9gr gives 1051fps, 11gr gives 1195fps)

I have some Titegroup that I may try in my next batch as well....

 

[jfh]

Duplicate

 

[pinkymingeo]

I get 1200 with a 200XTP and max load of AA9, but that's in a 6.5" revolver. In a 5" I can only come up with a little over 1100.

 

[ReloaderFred]

Attaining 1,200 fps in my 6.5" Model 610 is easy. It's getting near that in my 4.5" Witnesses that's hard.......... I won't even try in my Compact 10mm!

Fred