I'm getting geared up to try some short range benchrest using a 6PPC LV rifle.
What are people using for a sizer and seater on their competition rifle?
If it's a new build, the 'smith that builds it will be able to tell you what dies work with his reamer.
If it's a used rifle, try to buy the dies and brass with it or get the info on what dies work with the gun. If that's not possible, at least have the seller include 3-4 pcs. of fired but unsized brass that was shot in the gun. You can send them to Harrel's and they can send you a die. If none of that is possible, the Harrell's '1.5' die seems to work in the majority of PPC BR-spec chambers I've worked with over the years. At the very least, it will be a good place to start and Harrel's will swap dies for you if you want/need a bit more or less sizing. My Harrel's '1.5' and my Redding full length bushing die (#77319) are twins for sizing.
For an inline die for use with an arbor press....and short of a die made from the chamber reamer....the standard Wilson non-micrometer 6PPC seating die is my choice. They have a 'standard' and an 'oversize' seating die available for the PPC's. The 'oversize' version works best with the chambers that have the 'PPC U.S.A.' dimensions. The 'oversize' has worked great in every PPC I've worked with so that's where I start. If you have the standard die an it's a bit snug to get cases out of, Wilson will lap them for you. You can do it yourself on the earlier Wilson seaters that were made from 12L14 'leaded' steel. The later stainless ones are best returned to Wilson for lapping, if needed.
For a threaded style seater, I'm clueless as to what works well. Not saying they don't (because they do)...I just have no experience with them.
For what it's worth from a guy that doesn't shoot the PPC's much.
Others can likely give more guidance.
Good shootin'. -Al
P.S. Here's a good example of how to buy a used gun. I'm
re-homing this killer-good, Jim Borden built 10.5 lb. 6PPC from the estate of a very good pal. I've made sure it's new owner gets all the brass, the custom seating die, the Harrel's full length bushing die (with bushing), the chamber 'stub' for seating depth, a couple of dummy rounds for bullet seating depth and 20 rounds of loaded ammo (with the load info) with the gun. The new owner is fortunate to have a very experienced Benchrest shooter as his mentor through the process. This 'package gun' will get him up and running quickly. My late pal will be happy to know it's out there shooting dots once more.