I have been shooting 165 grain cast bullets in my 30-30 at a local silhoutte match. Most of the guys use 180 grain bullets. I use the 165 grain bullets simply because I do not have to seat the bullet with the gas check past the case neck. Some of the old time shooters were telling me the 165 grain bullets would not knock down the rams at 200 meters. I have been hitting and knocking them down. That is to say when I hit one it will fall about 90% of the time. I am shooting at about 1800fps (I do not have a chronograph) using what reloading info I have. My question is - If the old time shooters are using 165 grain bullets say at 1200 to 1500fps and I am using the same bullet at 1800fps does the fact that I am firing the bullet at a higher fps translate into enough energy at 200 meters to knock down the ram where the slower bullet will not?