Re: redding dies?
Not really, just saves one step if you need to full length. I bought my Redding bushing dies as full length. No accuracy issues with them or over working brass. Then again, the guns I have these dies for are tight chambered and turned necks.
You bought good quality stuff, don't second guess yourself.
If you can afford it, buy a Mitutoyo digital caliper or a Starret dial caliper. They will last a lifetime.
If funds are tight, believe it or not the $10.00 digital from Harbour Freight is very accurate and I don't hesitate to recommend them. They are the same units that Midway and many other gun related places sell with their names on them and they cost much less money. Look for the coupon in car magazines and newspapers so you can get the caliper for the $10.00
If you haven't already bought one, don't forget you will need a chamfer/deburr tool for the case necks