Today I played hooky with a Remington 788 in 30/30 with a new 150 grain soft lead HP .311 diameter.
The results I found was very interesting and wished to share what was done.
I started out by annealing 200 winchester 30/30 range brass, I then loaded 5 rounds using RCBS FL sizing die,
Lyman 30 caliber short expander die, Forster bench rest seating die and a Forster 30/30 tapper crimp die.
The load 34 grains of IMR 4350 150 grain .311 hp cast bullet with 20 to 1 lead, hornady gas check lubed with white label bullet lube the commercial version that flows at 104 degrees the bullet with gas check weighs 155 grains.
load produces 2008 fps and expands very well.
Now I thought I really needed to inside neck ream the brass to stop the flyers. With this load I was always seeing flyers. So I looked into my RCBS expanders I had on hand and I settled on a .310 expander and loaded the same 5 rounds stepped outside and fired the 5 with the larger .310 expander. The group was almost 50% smaller, so if you have a load that is almost working try a larger expand may help you as it has help me.
Lyman expander is the same as the rcbs .3065 then .310 on the second step so the expander was to small for a soft .311 bullet.
1000 yards easy