Re: 30-30 rifle
If you arent real gun and ammo savvy, keep your shots to 200 yards or less. Hogghead had good info, but based on his input and info he offers here on this site, I know him to be very knowledgable about the fine ins and outs of rifles, bullets, and how it all works.
If you are a casual shooter and dont get into the science of it all, keep your shots under 200 yards like I said. Being a casual shooter isnt intended as an insult.
Hogghead, you ever monkey with any 30-30's with the 26" octagon barrel? I was blown away earlier this year when I discovered how accurate they are. I shot a Cowboy Lever Action Silhouette match with one. I was VERY impressed.