02-03-2020, 02:03 PM
I know that you are using 123 ELDM but each bullet make and design has it's own MAX load in YOUR rifle. For example, in the same rifle using all the same components only changing bullet make weighing the same, 120 grs in this example. One a Sierra Pro Hunter the other Speer Gold Dot. I can load 28.5 IMR 8208 with the Sierra safely but only 28 grs with the Speer GD.
I have been hand loading 40 years and have learned that it is very true. "If you change anything in a load back off and work back up."
I don't have a 6.5 Grendel bolt rifle but like most bolt rifles I would think that you probably can load to a longer COAL than you can by being limited by the AR magazine. Longer length allows more room for powder and depending on your throat length you may find that it allows you pressure wise to use more powder and can achieve higher velocity safely. Work up slowly using a chronograph and the rifle will tell you what it will handle.
I have been hand loading 40 years and have learned that it is very true. "If you change anything in a load back off and work back up."
I don't have a 6.5 Grendel bolt rifle but like most bolt rifles I would think that you probably can load to a longer COAL than you can by being limited by the AR magazine. Longer length allows more room for powder and depending on your throat length you may find that it allows you pressure wise to use more powder and can achieve higher velocity safely. Work up slowly using a chronograph and the rifle will tell you what it will handle.