Careful on that "magnum" designation, David… as with +P designations in anything other than .38 Special, 9 X 19mm and .45 ACP¹, it is strictly marketing hype.I have found the Norma and Kaswer 10mm magnum loads to have the highest power factors. The Kaswer 170gr grabber averages 1310fps from my G20 on my Oehler model 35p. Corbon also makes a 180gr SP hunting load that averages 1285fps from my G20.
Bill "mades his bones" at Second Chance around that time, and probably fell a bit under the influence of Peter Pi as far as product hype… virtually everything from CorBon is marketed as "+P" whether or not there's a SAAMI specification for it… and I suspect that's where the "10mm Magnum" originated.I used the title 10mm magnum as it is printed directly on the side of the Kaswer box, I know full well that it is all subjective but Kaswer did make two seperate rounds the 10mm 175gr JHP circa 1987 and the 10mm magnum Law Grabber 170gr. circa 1994.
There ya go, Mike… that's one of them, and David knew that one, as well as the #1102 Norma 170-grain PC ("power cavity" or "pointe creuse"). And yes, that was the original Bren Ten round developed by Norma after SuperVel and Hornady passed on it… at various times in the bizarre development of the pistol, Dornaus & Dixon's intermittant news releases sent to their "investors" cited both as producers of the round.An old box of Norma that I have (20rnds) lists a 200 grain Truncated Cone Full Jacket (believe the origional Bren 10 load) at 1200 fps and 635 ft. lbs.
Ace Custom 45s Inc. & Texas Ammunition Co, will be introducing 3 new 10 mm "EXPRESS" loads for 10 mm fans at the 2001 NRA Show in Kansas City, MO - May 18th-20th. Our booth # is 208 please stop by and visit us.
The new "EXPRESS LOADS are as follows: ( available June 2001)
200 gr, FMJ FT 10 mm "EXPRESS" @ 1250 fps 694 ft. lbs!
165 gr, JHP 10 mm " EXPRESS" @ 1350 fps 668 ft, lbs!
135 gr. JHP 10 mm " EXPRESS" @ 1450 fps. 630 ft. lbs !
The original "NORMA" 10 mm LOADS were as follows:
200 gr. FMJ FT,. @ 1200 fps
170 gr, JHP @ 1300 fps.