I've loaded coated SWC's from MBC to full on magnum loads for 357mag and 44mag with no leading. Hi-tek coating works.
But........... Unless you specifically ordered a softer (38 Special) bullet, the MBC bullets are 18 brinell hardness. The bullets they sell intended for 38 Special are 12 brinell hardness.
I don't know how much leeway the Hi Tek coating gives you with a softer lead compound bullet like he has bought.
HP-38 & 231 powders are the same, HP-38 data is easier to find in older re-loading info.; I use the HP-38 data with good results in 38 spc & 357 mag. I only shoot the 357's in my Marlin CB rifle.
I'm far more of a BPCR PPB guy than handguns, and all i cast are 16:1 525 grain slicks for wrapping. well, either that or .600 or .530 lead balls for flintlock long guns.
I have, and have used both trail boss and BE, as well as unique. I think i'll stick with w231/125gr for the mild loads and A2400/147gr for the medium loads. The blackhawk's weight really helps and i have no problem with one-handing those stiffer loads.
I just loaded up some .38's with 3.5, 4.0 and 4.5 grains of w231 under a 125 grain hi-tec slick for a soon-to-arrive smith 642c airweight. curious to see/feel the recoil with that 15oz peashooter.![]()
I believe what people were warning you about was either creep or possible setback: "slick", smooth (coated) bullets with no cannalure can cause problems at "true" 357 Magnum (or 357 SIG!) velocities. Hence my initial question way back in this thread, BTW.
Perhaps the manufacture's advertising feller called them, mistakenly, "cowboy bullets" but anyone with any experience reloading for revolvers and pistols will see that they are designed for 9mm pistols...
I started reloading revolver ammo in summer of '69. I have 7 revolvers that I reload for, jacketed, lead, PCed and Hi-Tek. I have purchased a few thousand "black bullets" from Precision, and I have never, nope never seen a revolver bullet sans crimp groove or cannalure. I would also hazard to say I don't remember ever seeing a bullet designed for a semi-auto that had a cannalure or crimp groove. If the bullet designer made up the ad copy stated the smooth sided, no groove/cannalure was designed for "cowboy" revolver shooting I might take that into consideration, but even "new and improved" bullet design is still the same old stuff; cannalure/crimp groove for revolver bullets, smooth sided, no groove bullets for semi-auto use.hmm, i'd suggest that before making assumptions you'd be best to have called Precision Bullets for their take on what they offer, and who's using 'em with no issues. they've made and sold millions of their hi-teks and either they'd be stupid for making/labelling a product incorrectly, or be out of business due to their negligence. as it was, i made the call yesterday afternoon, spoke with the owner/operator, and got the real scoop.
My main problem with that bullet design is not whether it was originally designed for a semi auto or revolver, but rather the lack of a crimp groove. And even then, I wouldn't have a problem running them in a revolver except maybe one of the ultra light scandium guns because of crimp jump. But I would never run them in my Rossi carbine because of the lack of a crimp groove to physically lock the bullet to the case until ignition. There is just too much chance for recoil to push the bullet well into the case with the tubular mag spring already putting everything under load already.
@ STORMINORMAN, I have loaded quite a few of those MBC 140 grain Zingers and they perform real well and feed great in my Rossi. I've chronoed them at over 1900 ft/sec out of the Rossi with no signs of leading. But if you look at the Zinger, it has a definite crimp groove plus a lube groove, which is different from the Precision bullet the OP linked to.