I don,t think RL22 and MRP are the same. If I make to loads just the same RL2 will be faster, but I will have to stop adding powder to
the RL22 load as it gets over pressure. With the MRP after I get about one more grain of powder it starts to exceed velocity of RL22,
and I can keep going a little. Also I get more velocity from heavy bullets in the 270 win. Have started to use a lot of RL23 in the 270 with 140gr
bullets, also works good in 270 WSM. But not so good in small case, you can not get enough in.
