I used the Buffalo Ball-ets for a couple seasons on deer. They worked pretty well and were very easy to load. I could buy them at Cabelas and Scheels (upper midwest store). They were relatively cheap, something like $9 per 50. If I recall, the 50 caliber Ball-ets weighed 245 grains, or in the neighborhood. Try Cabelas website and I'm sure you could order them over the internet.