I was recently given about 1000 Starline 45 colt cases from a relative who got them from a friend etc. These looked to be the proverbial "once fired" brass and I was very happy to get them as 45LC is pricey indeed... But upon digging through the box of brass, I discovered that about 500 of them are "Starline 45 Colt Blank brass." which, though somewhat tarnished, appear unfired.https://www.starlinebrass.com/brass-cases/45-BLANK-45-colt-BLANK-brass/
I'd never heard of such a thing before -- they aren't crimped, look totally normal, etc. Upon checking starline's website I learned that they are identical in all respects to standard 45 colt cases - EXCEPT the FLASH HOLE is larger than standard (.140 in). BUT, the website states that they are not to be loaded with projectiles. They don't give a reason why.
I've done some sleuthing on the net and one forum mention said it was due to the larger flash hole potentially causing a more rapid ignition and subsequent high pressure condition. I'm not sure I buy that.
I'm shooting cowboy action/target punching loads with ~ 10,000 CUP (6.2 gr Titegroup) out of a Ruger Bisley Blackhawk which Mr. Linebaugh has demonstrated is capable of routinely handling 30,000 psi loads (I won't be shooting any of those, ever)...I will confess that I loaded up about 20 of these with 6.2 grains of titegroup and 200 LRNFP bullets and fired them with no adverse effects or any indication of pressure.
I'd hate to pitch 500 of my stash of brass - especially if the prohibition is based on a false premise (lawyers fear of someone loading a Linebaugh Load) or something that is simply not a concern out of a Bisley Blackhawk.
Anyone have experience with this?