Originally Posted By: steve garrett
do you use the coated bushings from redding? is that the way your getting away from case lube? also how many firings do you typically see before the shoulder needs to be bumpped back with a body die? scratch that, I see you answered that question, put another way if you only got 5 firings from your neck size brass and the shoulder needed to be bumped back, does that tell you anything bad?
with primer pockets there is usually a small amount of carbon in there after a firing, do you just prime over that with a new primer?
Steve, I do use the Redding coated bushings, but a carbide bushing could skip the lube just as well. Getting away from expanders is the main thing.
Number of firings before you need or want to shoulder bump... Just too many variables to make a blanket statement about what the required interval might suggest. If I was shooting bench rest, I'd bump every time - but probably not for the reasons most would guess. It would be purely about speed and ease of gun handling without disturbing the bags.
But, among the many variables that might influence how many firings before bolt closing gets stiff, would be... Pressure, brass to chamber fit, case design (body taper, specifically), brass strength or hardness etc.
All else being equal, I guess needing more frequent FL sizing might indicate higher pressure, but, all else really isn't ever equal. And even then, "higher" pressure isn't the same as "too high".
Primer pockets... Yup, I just seat a new primer right on top of the accumulated muck from previous firings. Haven't noticed any ill effects.
Back in the day, I obsessed over brass prep to a ridiculous degree. To include polishing the inside of necks, ridiculously anal levels of sorting brass, flash hole deburring as a one time operation and uniforming primer pockets after every firing (clean and re-uniform in one step, and the amount of fresh chips is one of the most reliable pressure indicators you'll ever see). And more.
But, no more... These days, with a new barrel, I start with excellent brass, do a cursory sort when I neck turn them (any that show neck thickness variation via uneven cutting curls on the tool get chit canned), then just load and shoot and be happy.
I should probably add a little note here, too. None of my hand loading practices described in this thread are "stand alone" operations. That is to say, it's all part of a complete system/process that starts before the rifle is even built. As an example, I don't just willy nilly decide to turn necks as something "new", for an existing process.
I start with the brass (and the hopeful bullet candidate, but about them, you sometimes just can't tell...). Then an excellent barrel blank is obtained (Lilja, Hart, Krieger, etc...). Then, a world class 'smith is hired to chamber the blank for specific chamber fit to that specific lot of brass. With a tight neck, always, for my bolt guns.
So, what I end up with, is a very good fit between brass and chamber. Very minimal neck expansion (for hunting rifles I run ~.0015 total clearance, .00075 per side). Which adds up to the least amount of brass movement possible. Making my bushing neck size only, w/out lube operation, about as painless as could be.
But, this was all part of the plan from the start. Not something that got put into the program later. And it all works together to provide superb accuracy with minimum effort.
I might also add one more thing. None of my centerfire rifles has ever had a single round of factory ammo fired in them. None. Ever. And, none of the rifles I use with any regularity are capable of firing factory ammo either. Either factory ammo simply doesn't exist for the chambering, which is most of the ones I shoot, or the tight necks prevent use of factory ammo which would be the AI's.
- DAA