01-04-2023, 05:01 PM
As on the 65grendel forum, Lee dies have a bad rep. Haven't heard of the OTI gun before, but 1.185 seems to be still too long (for whatever reason), maybe have a short chamber or something.
Do you have a friend with 6 Arc, maybe they could do a couple resizings for you to compare.
There is some company that has shell case holders of varying depth so you can use one a tad thicker to get some more setback, I forget what they're called. they come in a set.
One last thing, and this is just off the wall, but measure the depth of the face of your bolt. should be 0.136". Off the wall b/c if it were way off then the hornady's factory stuff shouldn't seat and fire. But some chambers of Grendel were made to mate up with a 0.125" bolt depth (ala 7.62x39 bolt), so they are cut deeper in the barrel chamber too. 0.136" face depth and chamber is the original but one company named it "grendel type II" b/c they made the 0.125" face depth dies/bolts.
Do you have a friend with 6 Arc, maybe they could do a couple resizings for you to compare.
There is some company that has shell case holders of varying depth so you can use one a tad thicker to get some more setback, I forget what they're called. they come in a set.
One last thing, and this is just off the wall, but measure the depth of the face of your bolt. should be 0.136". Off the wall b/c if it were way off then the hornady's factory stuff shouldn't seat and fire. But some chambers of Grendel were made to mate up with a 0.125" bolt depth (ala 7.62x39 bolt), so they are cut deeper in the barrel chamber too. 0.136" face depth and chamber is the original but one company named it "grendel type II" b/c they made the 0.125" face depth dies/bolts.