Only when you can't find one in stock anywhere else. I've ordered Forster from Creedmoor sports and something else from Brownells. But for stuff not in stock I've gone through PTG and Manson. It really doesn't matter and frankly I can do it with a crush fit new case if I really need to. Since 100% of guns I set headspace on I reload for it really doesn't matter. Using factory ammo is another ball game.Powercustom.com shows both the go and no-go gauge for my caliber in stock at this time for the Manson Headspace gauges.
Is any particular reasons to order directly from the manufacturer?
I just ordered a reamer and Go gauge from JGS, Go gauge was $80...Oww