RE: Modding a 30-30 to Ackley Improved? Wanting advice.
To save the most money,your best bet is to rent the "finishing" reamer-rougher reamer not needed to AI just 1-2 chambers. It's actually very easy to rechamber a bolt action rifle such as your 340. I'll be glad to help walk you thru it if you want to try it yourself. The MOST IMPORTANT thing to remember is attention to detail/precision.