Forget the comments about how all your problems will be solved if you buy other dies.
If full length sizing, and especially if using Lee lube, I clean the die every reloading session with a shot of action cleaner sprayed into the die.
It doesn't hurt to take 'em apart once in a while either.
I've switched to Lyman spray lube, and find it much better, and easier/faster than the Lee stuff.
The only thing that comes to mind is that if they worked great before and now are giving you trouble, you might have a hunk of grit or debris embedded in there.
Also, are you trimming your brass?
If full length sizing, and especially if using Lee lube, I clean the die every reloading session with a shot of action cleaner sprayed into the die.
It doesn't hurt to take 'em apart once in a while either.
I've switched to Lyman spray lube, and find it much better, and easier/faster than the Lee stuff.
The only thing that comes to mind is that if they worked great before and now are giving you trouble, you might have a hunk of grit or debris embedded in there.
Also, are you trimming your brass?