by Hoot » Tue Aug 04, 2020 10:30 pm
Welcome Aboard Pepe!
No, I can't see a good reason. 10 years ago, I embarked upon trying just that. The main problem is that once you cut down 284 brass to 1.70, the wall thickness taper profile is greater than actual 450b commercial brass. Depending upon the brand of 284 brass, you may wind up with bulged necks once a bullet is seated, that prevent the cartridge from entering the chamber all the way. I didn't have a problem with rim or extractor grooves, just the wall thickness near the mouth. At that point, the path is either reaming or turning the case down. A real pain in the butt. I had a jar of 1-F 284 brass left after abandoning the project. IIRC, I gave them to another member here for the cost of postage.
Lack of primer availability has come and gone before. Reloading consumers are too easily panicked IMHO. That leads to panic buying or worse yet, speculators buying up all the supply and hoarding them until the price skyrockets. We've seen this before, countless times. A lot of .22 rimfire speculators lost their shirts from scooping up all the available product post Sandy Hook, then charging $60-80.00 a brick on auction sites until the manufacturers were able to ramp up production. Some were lucky to break even if they weren't identified and treated like the pariahs they are. Remember the recent toilet paper rush? There's a special place in hell for speculators, right behind child molesters and disco promoters. If you yourself are in need of magnum small rifle primers that the 450b likes, forage around the mom and pop local gun shops. You'd be surprised what they have "in the back". If you find some, leave some for the next guy.
Hoot
In Theory, there is no difference between theory and practice. In Practice, there is.