Thanks for all the input on the load question.
I just made up 20 rounds each of 125 gr LRN over 4gr , up through 4.4 gr.
Full disclosure I'm shooting these through a Marlin 9 , which as you all know is a carbine format with an 18" barrel. Fun to shoot. I've been shooting it with steel sights but am moving on to a Weaver V3 which I think will suit this gun well.
One of the more experienced guys at my club said to start with 4gr and work up to 4.5 gr.
If it doesn't cycle I'll just move on up till it does.
I'll be doing some shooting Sunday so I'll see whats up.
I might make a few rounds of 3.8 and 3.9 after having read some of the posts here this evening .
Thanks to you all for the guidance .
The advise on the recoil spring is on point, I had to do some work on my High Standard Trophy to set that right .
I already changed out the spring and buffer in the 9.
We'll see what it takes to cycle it pretty soon !