Swifty: Loading for and using the 220 Swift brings with it certain "problems" or conditions if I could use that term?
I currently load for 5 Rifles in caliber 220 Swift!
Seems each Swift has its preference for "conditions" that have to be dealt with.
One of the conditions you will have to deal with is brass flowing due to the sloping design of the Swift. Among other things your necks may be thickening.
You did not say if this condition happens with new brass or with used brass - or with both.
If its with new brass you are either not chamfering enough or your expander ball needs to be replaced.
If its with used brass then your brass may be flowing (especially if you are using "full bore" loads) more than "normal".
One of my Swifts gets 5 reloads to a piece of brass and I do not load "hot" for any of my Swifts!
Personally I would start with a new expander ball (they're cheap!), along with more pronounced inside neck chamfering. If these things don't work then I would buy a new set of Redding dies for your Swift.
Sell your old ones - this is another relatively easy attempt at solving this situation/condition that is relatively painless, quick and inexpensive.
Then we also have to back up and consider if this "condition" is a real problem. Do you think your accuracy is suffering because of this shaving?
I doubt it.
I have shot countless handloads that have shaved a sliver of copper off of the bullet - with no noticeable effect (bullets disintegrating in flight, loss of accuracy, excessive bore fouling etc).
Some folks think that split necks are caused by excessive inside/outside chamfering - if you are not getting split necks I suggest chamfer the inside necks, some more!
Hope this situation gets solved to your satisfaction soon!
Long live the 220 Swift!
Hold into the wind
VarmintGuy