I have a question that I figure this sub forum is best suited for.
Yesterday as I was looking through the September 2012 issue of AR I found an article (p50) about "handgun stopping power" where the ballistics and penetration of various rounds was listed. My eye caught the results for the single 10mm load tested. A doubletap 135grain Nosler JHP with 1588fps MV at 10feet which resulted in only 6.5 inches of penetration in the gel block. Conversely the same round 135gr Nosler JHP out of a .40S&W traveling at 1315fps gets 11" of penetration. WTF? In fact the 10mm was the worst performer of all calibers tested except for 45ACP glaser safety slugs.
Is the light bullet from the 10mm disintegrating on impact or something?
The .357mag with a 125gr JHP at 1516fps got 14" penetration.
Am I missing something?
So I continue reading through the magazine in confusion and disgust and get to the article about the Ruger LCR-22 and SR-22 (p70). In the test data for these handguns the ballistics for the LCR with a 1.8" barrel were faster than the SR with a 3.5" barrel. Is the slide movement sucking up that much energy and resulting in slower bullet velocities despite the longer barrel? This might be true, but they also report that a Federal Gold Metal 40gr solid traveling at 931fps from the LCR has less energy (77ft-lbs) than the same round traveling at 910fps from the SR (79ft-lbs). The 910fps should yield 74ft-lbs.
Again am I missing something here?
I suspect it is simply sloppy QC on the part of the writers/editors.
The stuff about the 10mm has me concerned as that is the only caliber handgun I currently own.
Yesterday as I was looking through the September 2012 issue of AR I found an article (p50) about "handgun stopping power" where the ballistics and penetration of various rounds was listed. My eye caught the results for the single 10mm load tested. A doubletap 135grain Nosler JHP with 1588fps MV at 10feet which resulted in only 6.5 inches of penetration in the gel block. Conversely the same round 135gr Nosler JHP out of a .40S&W traveling at 1315fps gets 11" of penetration. WTF? In fact the 10mm was the worst performer of all calibers tested except for 45ACP glaser safety slugs.
Is the light bullet from the 10mm disintegrating on impact or something?
The .357mag with a 125gr JHP at 1516fps got 14" penetration.
Am I missing something?
So I continue reading through the magazine in confusion and disgust and get to the article about the Ruger LCR-22 and SR-22 (p70). In the test data for these handguns the ballistics for the LCR with a 1.8" barrel were faster than the SR with a 3.5" barrel. Is the slide movement sucking up that much energy and resulting in slower bullet velocities despite the longer barrel? This might be true, but they also report that a Federal Gold Metal 40gr solid traveling at 931fps from the LCR has less energy (77ft-lbs) than the same round traveling at 910fps from the SR (79ft-lbs). The 910fps should yield 74ft-lbs.
Again am I missing something here?
I suspect it is simply sloppy QC on the part of the writers/editors.
The stuff about the 10mm has me concerned as that is the only caliber handgun I currently own.
