First decide pump or auto loader. I started with a pump and went auto loader. Now I carry my pump as a spare and I forget to pump it. Buy a 3 1/2 unless you're convinced you'll never use it. If you run out of shells or a friend hands you a shell in a hurry you know you can shoot it. I have...
Shoots ok. Never messed with it much only shot the hornady 35 factory. The barrel rubs the side of the stock from the factory. It has about 250 rounds through it. I can supply to once fired brass if interested. Honestly I just dont see a need for the cartridge and not a fan of the action.
Where are you located? Ed Harren has built rifles for me. He is in Frederick but is not a mainstream builder. Dont be afraid to ship a rifle out. Most of the gunsmiths are great guys that treat you right.
I was having a similar issue about a year ago. A gentleman at the range was having the same issue. Come to find out we both had the same lot #. 1-2 out of 20 would ftf. I finally loaded up up ar plinkers with them.