[Larry Johnson]

I”ve loaded em with 24.6gr of TAC, CCI450 primer, seated at 2.250″. They worked pretty decent in my 16″ carbine at 2740fps
I’ve also loaded em a tad hotter with 25.7gr of W748, CCI450, also seated at 2.250″, same carbine at 2745fps
I’ve recently backed that last load down to 25.6gr of W748 due to a different LOT# on that powder, but still with decent results, 2700fps
As always, use of any internet load data is strictly at your own risk. For a 20″ gun like yours, I’d definitely suggest starting with lower charge than those mentioned and work up your ladder to find a nice node for your particular gun.

[Larry Johnson]

Today, I ran a ladder load test on the RMR 69g 3GH.
OAL =2.250″
Primers = 450CCI
Power = TAC
Brass = military mixed
AR15 PSA 16″ Upper on a PSA lower
Conditions were sunny. and mid 50’s temps.

I started out with 24.3gr and went to 25.0 gr in .1 increments of 5-shots each.
Each charge was weighed out by an RCBS ChargeMaster. Bullets were seated with a Redding seating die with a verrrry light Lee FCD crimp.
My lowest ES and SD came in at the 24.6gr load with an average 2742 fps thus backing up Jacob Wilcox’s load.
FWIW, at the 24.8gr loads, I was still seeing a low ES and SD, but I was starting to see some pressure indications and the 25gr, loads, they were obvious with my gun.
From today’s testing, the 24.6gr load works well in this bullet/powder combo for this particular rifle.

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