I've never resized 243 to 260 but I'm pretty sure you can do it with a FL 260 die. You might see if Redding makes a tapered expander ball in .260. That should make it easier.
Charlie
I have a question. I have about 150 empty once fired 243 cases that I want to size up to 260 rem., is there a article or book out there for resizing brass?
Or do I just do what some have said and just run them through a 260 fl die with plenty of lube on the case?
I have never done this I always just buy some cheap ammo and save the cases for reloading but I have these and don't need them for the 243 because I have around 300 loaded up for that rifle.
Any and all serious comments appreciated. THANKS
FROGGY
See profile for fire arms
Do it today there maybe no tomorrow
I've never resized 243 to 260 but I'm pretty sure you can do it with a FL 260 die. You might see if Redding makes a tapered expander ball in .260. That should make it easier.
Charlie
laportecharlie
That works fine - use an expander mandrel instead of the die. BUT......in my experience, you're going to get "doughnuts" on those cases by about the thrid firing........ I used lapua brass necked up to 260. I would try it on about 20 cases before I went whole hog on it.....
1. rund the cases over the mandrel to neck up.
2. F/L size with 260 dies to get proper neck tension
Sometimes the first time doing this you'll have high runout on the cases but they straighten out on the frst firing/forming. I would wait to trim/chamfer until after fireforming - then get the necks uniform.
Elkbane
and if you don't already do this-anneal those cases before you start to size them up. That should help them survive the up-sizing, and keep the necks from splitting later.
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