Getting started out into reloading just curious if there is a good reason to choose one over the other. I have plenty of mixed brass already, just checking for what direction to go in the future.
Use whichever you have more brass and primers for.
I have both and use primarily LRP brass because I have more.
SRP brass can take a bit more pressure before loosening pockets due to the extra brass support there.
Besides that… with standard loads, either will work fine.
I am using Large primer in Lapua brass, 155g palma, 155g TMK, 168g MK, 168g TMK, 170g Norma tip strike, and 175g TMK. All bullets shoot tiny groups opening up a bullet hole, Rem 700, MHV Krieger 10, 11, and 12 twists with short freebore chamber where the 168g MK BT shank sits right at the shoulder/neck junction to touch the lands....mercy, what a shooting chamber reamer!
I prefer SRP in brass with .473" head size. The brass lasts longer due to handling pressure better and primer pockets rarely ever grow with regular loads. I have Lapua 6.5x47 which is SRP, have had dozens of firings and no primer pocket movement.
I have been buying small rifle primer brass for the "308 family" whenever I can as I have more small rifle primers than large. 308, 260, and of course the 6BR family which only has SRP brass.
I've been checking with my local distributor/wholesaler.
Plenty of Federal, CCI, Remington and Winchester small rifle primers.
No stock of large rifle primers or magnum primers.