Thread: Good speed for 257R?

I've got the ai version on a old 98 action with a barrel from a long deceased maker from Tauranga i believe (Eagle?). 51.5 of 2209 gives 3300 with a 100 gn and I get 3050 with a 120 using N160. Of the older powder types, N160 is a good powder in this case . 24 inch tube.

As Moa hunter indicated most 87-90 gn pills in .257 cal are very soft and at high speeds you see expansion differences in the 100 grainers. The 117/120 pills tend to penetrate well. Good for bigger deer but poor /slow killers on goats and light pigs etc. I reckon the 120s behave like 130s in a .270W.