I like them. My BSA R10 really likes the 10.5gr L lot pellets. Measuring the head size they were around 4.9-4.5mm. The latest M lot pellets seem to be in the 4.54mm head size range and don't shoot as well out of the R10. I have not tried the M lot pellets in my other rifles yet. Whether L lot or M lot the ones I ran thru the PelletGauge were pretty consistant as far as head size goes and very rarely a dented skirt. I do wash brown box Crosman Premiers which is quick and easy. I use the slightest amount of Slick50 One Lube on them after washing to keep them from oxidizing. I skirt as tiny amount as possible in a ziplock samwhich bag, dump the pellets in the bag, and roll them around. As fast as I go them them I should probably skip the lube step as I, after a lot of testing, do not like lubing pellets as I find accuracy suffers.