MRP is claimed by some to be the same as RL-22, maybe made to a higher standard.
There can be lot to lot variation, maybe more with RL-22 than MRP. Even if they are nearly the same, there can be slight differences in burn rate and data.
RL-23 is said to better than ‘22. I have a big jug of MRP, some RL-23, doubt I’ll buy any more RL-22.
Don’t think RL-26 is an optimal Roberts choice. Too slow. Great in 7RM and such.
DF
