Definitely not .44Special, but not full-spec for .44mag ... the above weights and velocities are in the 7xx ft-lb range (765 ft-lb and 789 ft-lb) ... way above .44Special, but well below full-power .44mag. DoubleTap 240gr JHP's are listed at 1500 ft/s and 1200 ft-lbs (7.5" barrel), probably somewhere around 1370 ft/s and 1000 ft-lb for a 4-1/4" barrel, I suspect. PPU's are listed at about the same level.
Mike,
If you really want to have some fun, get yourself a chronograph and test some of the velocity claims of ammo makers.
Do this with different barrel lengths and different guns.
Do it under different temperature and weather conditions.
Then do it all over again with handloaded ammunition.
Then try it again with different lots of the same components.
Then do it again with new brass, 3x fired brass, and multi x fired brass.
I think you’ll find that very few real life velocities will equal maker’s “optimistic” claims (especially with shorter barreled handguns) – not saying some won’t (Buffalo Bore and Underwood seem to most consistent in equaling printed claims). Double Tap seems to be a bit optimistic -- PPU also falls in the "a bit optimistic" category.
A lot of work has been done on factory ammo by “Shadow” and “Intercooler” here:
44 Magnum Factory/Commercial Ammo pulldowns - 10mm-firearms.com
Check out Double Tap results in posts – #16, #17 and #48. Remember “Shadow” is using an 8 3/8” S&W and “intercooler” a 7 ½” Redhawk. Double Tap “made it’s bones” loading hot 10mm ammo. I chronoed some DT 230gr WFNGCs at 1,045 fps vs the stated 1,120fps from a glock 20 – the same gun DT used for the quoted vel. Diff guns, diff component lots, diff temp, etc., etc.
Don’t mean to infer this is “the definitive” study but rather an example of a couple of interested shooters conducting some limited tests.
From John Taffin on Elmer Keith’s guns and loads:
-44 MAGNUM: Keith early settled on 22.0 grains of #2400 with his #429421 bullet for 1225 fps. out of a 4" Smith, 1400+ fps out of a 6 1/2" Smith or 7 1/2" Ruger. These are hunting handloads pure and simple, with this load taking big game all over the world.
The Sixguns and Loads of Elmer Keith
Anyway, while you are right that the 265gr Load at 1,140 fps (4 ¼” bbl) isn’t a full spec .44 Mag load, it certainly comes close. The Fed Factory load at 1,217 fps (which I chronoed at a 1,375 fps from a 7 ½” Ruger Bisley Hunter is .44 Magnum ammo from a major manufacturer and was made in 1981.
Anyway, there is a wide range of .44 Magnum loads, some of the ones that achieve very high velocities, are from Botique makers and probably do so at questionable pressures – they aren’t going to blow your gun up, but over time they will most likely loosen it up. At a $100/box of 50 delivered, you won’t be shooting these in any quantity. Further, I can’t duplicate their velocities in my guns using current reloading data. Different guns with the same barrel length will also give different velocities. Go back up to my post #13 – the 240gr XTP, 270gr Speer FP, and the 325gr Beartooth loads are right out of Hodgdon’s on line load data – you can see my results from 4 ¼” bbl vs Hodgdon’s.
Really didn’t mean to get this long winded, but thought it might be appropriate to discuss mfg claims and “.44 Mag specs”.
Also, I’m not sure who would buy the M69 to shoot hundreds of Buffalo Bore “Deer Grenades” (240gr at 1,600 fps) – which is refed as a +P load (no such thing as +P load for .44 Mag).
FWIW,
Paul