Whidden custom dies?

Well, I used Harrell's for my bushing sizing die, but that was before I knew about Whidden's. Harrell's was "The Thing" back in the 90's when I got into the 30BR. Still think they make a quality product at a very favorable price point. I have a couple of Whidden's dies, too, and think they are great. You can't beat the customer service from either place. If you are having your rifle chambered with the "Robinett" reamer, save yourself some money and get a Harrell's. If you have a more customized chamber, Whidden would probably be a better choice.

 

My experience exactly with Whidden.
4th time back, and I gave up. Something has to change there.

 

Too much arbor press leverage required above 6BR?
Never heard that one before...

I seat 300 NMI with a Wilson arbor die and no issues. Seats as easy as any of my other rounds using custom cut Wilson seating dies. Maybe try adjusting your neck tension. Sounds like it's too tight.

 

Its slighlty different than the original Robinette. At the .200 datum is .4715 instead of .4707 and the neck is .331 instead of .330.