First set of loads clocked well above expected velocity and I got "stop here NOW" class pressure signs before reaching the end of my 5grn ladder. Thats never happend to me before. I was using 95gr pulled btsps, IMR 7828, and Necked down Nosler 6.5-284 brass (ive had some issue with nosler brass in my 06, but this stuff seems good, very consistent). The only thing that deviates from "recommend spec" are the necks are .275, where as the cartridge drawing show the 6-284 at .267 at smallest. The guy i bought the rifle from was shooting resized .284 brass in it before this, and didnt mention an issue (dosent mean there wasnt, I didnt actually ask). bullets dont fall into the spent cases like they do some of my factory rifles (say remington?) but they also slide in with light finger pressure, which is how my two custom gun guns are, and a little less than spent shells from my new .250AI. I also pushed a few dummies into the chamber with my cleaning rod to see if i could feel any resistance, and there isnt any unless i dont totally take the .257 size bump (i have a .257 neck sizer im using as an intermediate step) out of the necks. Also accuracy was horrible, but that could have been the fact it was POURING on me when i was testing this. So heres the question Is there any definitive way to tell if the neck thickness is an issue without a chamber cast? I have some cerrosafe but its packed away and a pain to dig out now that it is.