I acquired a rather large supply of 147 grain bullets several years ago, and gave them a try in my M1A Socom 16. I was looking for some ammo that I could shoot economically and basically do some tactics training with the rifle. Since then I also use them in my AR10 also in the same manner. They are great for this! When I say tactics training I am referring to shooting from various positions, some from behind barriers, etc and moving from one position to another. I like the practice of shooting from varied positions; it improves my overall rifle handling skills. I wish there was a range near enough that was set up for this, but I do the best I can where I am.
The 147’s are definitely not the most accurate bullet you can shoot out of a .30 cal rifle, but typically they are quite cheap. Loading them can be a little frustrating at first if you are used to loading for precision, which I think most reloaders are shooting for. The tolerances on these bullets are much looser than quality commercial bullets, with variances in the ogive and diameter and a wee bit in length at times, but all are within SAAMI specs. You will find, as Metal god pointed out, that it is difficult to get a consistent alignment in the cannelure for crimping. I basically shoot for a middle of the road length that allows for give and take, but aligns the mouth over the cannelure even though some are higher or lower than others. Doing this goes against the grain for my usual loading criteria, but it works just fine with these bullets as long as your COL is within SAAMI specs.
Accuracy is typically around 2” to 3” at 100. Not very good, but still useful for range fodder. I was out with a friend a few months ago and I was goofing around shooting bench rest with these bullets just to see how good they would do that day; I shot four so close in the bull that they looked like a four leaf clover, and the fifth was 1 3/4” high and right. All five were consistent shots on my part. We laughed at the four leaf clover, cause we knew that was pretty miraculous with that ammo.