splitting necks

[g n brezinski]

my friend has a 22/250 remington 700 v s.he has loaded remington new cases 2 or 3 times.the cases are splitting at the necks.my thoughts are the cases are not properly made by remington.any thoughts on this.the loads are not hot!!!
gary b

 

[Max Shaffer]

annealing

cases may help but the neck dia. in the barrell is likly quite large and sizing them down to factory spec in the die is reworking the brass so much that it really work hardens and splits. A redding die using bushings to resize only enough to hold bullets instead of sizing real small and then dragging an expander back thru that barely expands enough to allaow a bullet to seat, tightly. That might help. Measure the OD of the fired brass and then the OD of a resized case that was resized but not expanded. Also a resized and expanded case. You will probably be surprised how much the cases change.
Max

 

[f d shuster]

Case necks/splitting

Most factory chamber neck diameters for 22 CF ctgs. measure .256"- .257". measure a fired case neck and it will probably be .255"- .256", allowing for the springback. Then measure a loaded round neck dia. If it's Remington brass, the dia. will be approx. .246"- .247". Then measure the FL sized, but not neck expanded dia. ( take out the expander button/de-capping rod) of that same case after sizing. it will be approx. .243"-.244". Do the math: the brass in the neck is being "worked" up to an approx. maximum of .014"/ .007" on each side. You may save a few thousands, at the "low end" by using a neck bushing die ( only kind I use, but with tight-no turn necks), but the real culpret is that big, sloppy chamber neck diameter. Not much you can do about it: one of the joys of a factory chamber.