A builder/shooter of bench rest type rifles needed help reducing neck expansion, his 308 W necks were .335 before firing and .345 after firing, seems someone convinced him his one hold groups would improve if he reduced his neck expansion, after we finished his neck OD measured .341, with full length sizing to the chamber yet to be done.
But this is about sizing and lube. The press we used was an A2 RCBS, first he started with Dillon in the can,then Dillon in the bottle, then he went to the Imperial Sizing wax, the cases did not want to go into the forming die, after the cases got into the die they wanted to stay in the die, I am not a fan of punishing a press, cramming the case into the die does not do the case any favors, pulling the case out of the die when the ram is lowered does the case more harm, in 55 years+ of gun smithing he never found it necessary to form cases, and I wondered how is it possible to improve on one hole groups.
I offered to furnish some lube that is not on anyone’s list of approved lubes, and I suggested using new/unfired cases when forming, I left my dies with him, there is not enough room around a press for 2 reloaders, my plan was to have 100 cases formed in 2 hours, with my help, he had 2 cases formed in one hour.
Again, when there is no demand placed on a lube, all of it works, things change when the lube has to perform, I do not use Imperial sizing wax, I do not use Dillon in the spray can or bottle unless I purchase a box or bench full of equipment with the lubes thrown in.
Again, everything failed me when I attempted to reload for a Model 70 Winchester chamber to 300 Win Mag, Winchester and I had words, I wanted a chamber that would fit my dies or a set of Winchester dies that fit their chamber, after attempts by the local warranty shop to make the chamber smaller???? they, the shop, sent it to Winchester, I could have chucked the cases into a collet installed on a lathe to reduce the diameter but when fired the case would expand and require collet sizing ‘again’.
F. Guffey