One of my shooting buddies asked my opinion about "something weird" happening to his new batch of .38 Spl reloads.
He recently bought a supply of 158 Gr JSP.357 bullets & loaded them according to his own favorite tried & proven load recipes. One of those (and one i successfully tried as well, I might add) is 3.5 Gr of HP-38.
As these were a new brand of bullet , he loaded some "test loads", ranging from 3.3 , over 3.5, 3.7 & 3.9 gr. of HP-38.
Now, I know this guy : he's been shooting & loading for almost 30 years now, and has had armorer's training in the armed service. He knows his stuff, & is certainly no reckless fool when it comes to guns & ammo.
What happens (& I witnessed this several times yesterday at the range) is that when he fires those loads form his 6" barreled S&W 686 at the bullseye target at 25 meters, you can actually SEE the bullet hitting the FLOOR of the range ONE FULL SECOND AFTER the shot has been fired.
Not only that, but (OMG !) this is only the lead bullet core kicking up dust out there, as THE JACKETS STAY STUCK IN THE BARREL !
Now I seem to remember that -way back when- (yes, I'm that old) the SPEER reloading manual warned against light loads with one particular bullet design : a 140 or 145 Gr semi-jacketed .357 bullet, as these could show just this kind of core separation (those bullets are no longer made, I think) .
What's really weird IMO, though, is that those same bullets, loaded in front of 4.7 to 5.0 gr of HP -38 in .357 Mag cases, work perfectly !
Can pressure generated by this load (5.0 gr in .357Mag case) be that much more than that from 3.5 Gr in .38 Spl cases, ?
Anyone have any experience with this phenomenon (as to possible cause &/or cure) ?
He recently bought a supply of 158 Gr JSP.357 bullets & loaded them according to his own favorite tried & proven load recipes. One of those (and one i successfully tried as well, I might add) is 3.5 Gr of HP-38.
As these were a new brand of bullet , he loaded some "test loads", ranging from 3.3 , over 3.5, 3.7 & 3.9 gr. of HP-38.
Now, I know this guy : he's been shooting & loading for almost 30 years now, and has had armorer's training in the armed service. He knows his stuff, & is certainly no reckless fool when it comes to guns & ammo.
What happens (& I witnessed this several times yesterday at the range) is that when he fires those loads form his 6" barreled S&W 686 at the bullseye target at 25 meters, you can actually SEE the bullet hitting the FLOOR of the range ONE FULL SECOND AFTER the shot has been fired.
Not only that, but (OMG !) this is only the lead bullet core kicking up dust out there, as THE JACKETS STAY STUCK IN THE BARREL !
Now I seem to remember that -way back when- (yes, I'm that old) the SPEER reloading manual warned against light loads with one particular bullet design : a 140 or 145 Gr semi-jacketed .357 bullet, as these could show just this kind of core separation (those bullets are no longer made, I think) .
What's really weird IMO, though, is that those same bullets, loaded in front of 4.7 to 5.0 gr of HP -38 in .357 Mag cases, work perfectly !
Can pressure generated by this load (5.0 gr in .357Mag case) be that much more than that from 3.5 Gr in .38 Spl cases, ?
Anyone have any experience with this phenomenon (as to possible cause &/or cure) ?