Old man proceeding with caution..need some input.
I have been loading for a long time and still have all my digits, hearing and eyesight. I'm about to take the leap into .40 cal reloading and have a question or two...I've not shot nor reloaded for .40 and recently received a new 75b CZ in .40 cal. About the same time a man I've bought brass from many times advertised some police range 1x fired Winchester brass so I bought a thousand pieces..it's beautiful stuff but it's got the square "Glock" firing pin indentation and I notice some mild deformity near the head end of the brass....I got a feeling it's suffering some Glock deformity but I'd heard this was not an issue any longer and just to load reasonable loads with the right powders and no issues...I have a set of Lee dies I just got and ran several through to see how they looked...I don't have a Wilson gauge so I used the barrel of my CZ..After full length sizing he brass it is marginal as far as a decent fit in the barrel...some is dead on and some has a bit of a reluctance to drop in. The "deformity" I've mentioned looks like the sizer "ring" that I have gotten in the past from a sizing die not going all the way to the rim..but this stuff has not been through a sizing die as yet.
I have done some reading and some folks said to get a Lee Bulge Buster and run the brass after resizing and it should take care of the issues as long as the brass does not have obvious defects, etc...I have not ordered the bulge buster as Lee's written material says (in bold letters) if the brass has been fired from a Glock and has the bulge..that if you used their buster to straighten out the brass you stand a good chance of it blowing out...and they do not recommend it.
I know the .40 is high pressure but this brass is brass that looks wonderful to the eye..it does have some deformity (slight) near the head end but I've loaded and shot an awful lot of brass over the years that had much worse 'eyeball" and chamber fit than what this seems.
I don't like to go against what a manufacturer has to say but has anyone else had questions or experience along these lines? I know Lee had an issue with Federal Primers (I think it was) for years and it turned out to be some reason not involving danger...Again, I just don't have any prior experience with a .40 and I really want to reload for this CZ as my other CZ's (a 9mm and a 45cal)both love my reloads with pc lead projectiles. This is not "old brass"..it's from a current range session at a police range...and I do trust the brass supplier..these have been cleaned beautifully so I can really get a good look at the brass...no issues except as I've noted..no "smiles", no extractor nicks, no splits, cracks, etc...just nice clean once fired brass...but for sure a Glock firing pin mark and the little bit of deformity down low.
Appreciate any comments..
Thanks
opos