I'm using a Sierra bullet of I think 200 or 225 gr I don't recall and have the gout so I'm not going to walk to the basement to look
and IMR 4227 in the range of 34 gr. It's like shooting a 243 in my Pre 64 M70. I'm going to use the same bullet in the 38-55 when I start working up a load for that.
I don't see to many Speer bullets for sale any more but will look for some.