Hang in there. First, Reread what Randy said and follow his advice. I
I have the same setup in a dropport Rebel action. It will shoot much better once you get it tuned- like .1s and zeros at 100.
It would be helpful if you tell us what you mean by “jamb” or how you are getting to jamb. At some point as you move into the lands, you will not be able to go any further, regardless to how long you seat the bullet. That point changes as you adjust neck tension.
I would seat an unloaded round very long with whatever neck tension you intend to test, chamber it letting the bolt seat the bullet and then pull it out and measure it. (I use a rod to gently help push the round out if it sticks in the lands). That will tell you the maximum amount into the lands that you will be able to go with that neck tension. When I first started, it was easier for me to work backing off of that point to develop a load. I would start with a bushing .003 less than my loaded round and tune my powder charge with that. After getting dialed in, I would test neck tension to see if it got any better.
The other thing you need to know is what max load is for your gun using that bullet. The 2630 load you are working with is bad anemic. I have a couple of savage actions that easily handle more than that. With my Rebel, I can run over 3000fps with no pressure signs. Yours may be different so start low and work up. But get to a better velocity node if you want to see how good this the br will shoot. I expect it will be over 2900fps.
The neat thing is the hard work has been done for you. You can pretty much expect it to shoot between 2950-3000 fps.
I have the same setup in a dropport Rebel action. It will shoot much better once you get it tuned- like .1s and zeros at 100.
It would be helpful if you tell us what you mean by “jamb” or how you are getting to jamb. At some point as you move into the lands, you will not be able to go any further, regardless to how long you seat the bullet. That point changes as you adjust neck tension.
I would seat an unloaded round very long with whatever neck tension you intend to test, chamber it letting the bolt seat the bullet and then pull it out and measure it. (I use a rod to gently help push the round out if it sticks in the lands). That will tell you the maximum amount into the lands that you will be able to go with that neck tension. When I first started, it was easier for me to work backing off of that point to develop a load. I would start with a bushing .003 less than my loaded round and tune my powder charge with that. After getting dialed in, I would test neck tension to see if it got any better.
The other thing you need to know is what max load is for your gun using that bullet. The 2630 load you are working with is bad anemic. I have a couple of savage actions that easily handle more than that. With my Rebel, I can run over 3000fps with no pressure signs. Yours may be different so start low and work up. But get to a better velocity node if you want to see how good this the br will shoot. I expect it will be over 2900fps.
The neat thing is the hard work has been done for you. You can pretty much expect it to shoot between 2950-3000 fps.