I bought a Remington 788 in 30/30 last month. You may recall the post. I've been shooting my normal 30/30 cast loads through it with pretty good results, averaging 2 MOA at ranges out to 200 yards.
After reading here that many members are using very slow powders in their cast boolit rifles, I thought that I'd give it a try. Several years ago, a friend who had a commercial loading business gave me about 10 pounds of 4831 powder. I don't shoot magnum rifles so I've been looking for something to use it in so I thought... Why not?
I loaded the usual Lyman 311041 boolit sized to .311" with ALOX lube and a gas check over 32, 33, and 34 grains of the 4831 and set it all of with Remington 9 1/2 LR primers.
Results on the low end were a little disappointing but at 34 grains it all came together with 10 shot groups at 100 yards measuring between 2 inches and 2 1/2 inches. At 200 yards, I only had 5 rounds left, but they went into 3 1/4 inches, so I was pretty happy with that.
Due to urban sprawl behind the impact area, my club installed cement overhead bullet screens to keep all rounds going into the impact area. Unfortunately they also block out the sun, so no chronograph data today. Given the ballistic coefficient of the 311041 and that it dropped 15" (7 1/2 MOA) getting to 200 yards from the 100 yard zero, indicates that the muzzle velocity of the 34 grain load is right at 1,750 fps.
Even at 34 grains, there were some residual burnt husks of powder kernels in the bore. That often is an indicator of powder not burning at its desired pressure. So the next step is to try 34.5 and 35 grains of the powder, although both of those will be compressed loads.
After that, I'll try heavier boolits such as the bore riding Lyman 311299 weighing in at 208 grains all lubed up. Sadly, the magazine is only long enough to feed factory length 30/30 rounds: about 2.520." Given that, they will have to be single fed.