Fess Wrote:I know that there were a lot of problems with PTG reamers for the 6.8 SPC and SPC II.* What have been the problems been with Grendel-related reamers?
* In particular, a sharp angle at the step-down from the neck to the freebore. There is an error in the 6.8 SPC SAAMI drawing (two numbers transposed, increasing the angle), but many PTG reamers had an even sharper one that sometimes shaved copper rings from bullets and caused pressure issues. PTG eventually corrected the reamer drawing but did not update the "revision date," causing additional confusion.
The reamers were out of spec which led to short chambers (I think Lilja got bit by this in a group buy). From my understanding PTG werent made to spec from the now SAAMI 6.5 Grendel drawings. PTG supplied a lot reamers for 224 Valkyrie on its introduction and were supposedly the cause of accuracy issues associated with the wrong free bore dimensions.
Ive personally read of no problems with Manson reamers other than delays in shipping and being difficult to contact.
Here is a link to a custom search feature for the 6.5 Grendel forum. Do a search as there should be threads discussing PTG reamers.
https://cse.google.com/cse?cx=0163689474...cu1o&hl=en