Usually make a post deer season gun related project every year. For the 2018-2019 deer season it was an AR15 upper in .375" based off of the 6.8SPC case. Sarco had cheap barrel blanks on sale and Starline makes a 6.8SPC basic case that just needs rough cut to length, resized and a final trim/debur. You can also make cases from 6.8spc brass. I had some once fired 6.8spc cases and the first 50 or so were made from once fired Remingtons. Figured out a cartridge and chamber spec, then made a chamber reamer from O1 drill rod and ordered the blanks from Sarco and a 6.8SPC bolt carrier group from Brownells.