The .307 Powder River Magnum

The .307 Powder River Magnum (.307 PRM) is a long range hunting cartridge intended to fill a niche, between a .308 Win. and the larger Belted Win. Mag/ Rem. Mag cartridges. I would like to stress that We are NOT trying to re-invent the wheel with this cartridge. The cartridge is just a small, but integral part of a complete shooting system. The end goal of the "System" is to have a, lightweight, inexpensive, Do-it-yourself rifle capable of consistent, reliable accuracy at yardages between 400 and 600 yards. The parent case chosen for the .307 PRM is the venerable .284 Winchester. It was chosen because of it's efficient design, powder capacity, and ability to chamber in a short action. The cases will be loaded with .30cal 155gr. high coefficient boat tail hollow point hunting bullets. Load data will follow the completion of the first rifle.

The rifle action chosen for the build is the Savage Model 110. Chosen for it's low cost, quality, and availability. You can hardly walk in to a pawn shop in my area without seeing at least one Savage 110 rifle on the shelf! However, the primary reason for choosing the Savage bolt action rifle is the fact that the average gun owner can order a barrel and install it themselves saving money on gunsmithing services.

Please be aware that this is NOT an illustrated "How To" on building your own custom rifle. It is merely a step-by-step accounting of how two country boys with an idea built a cheap long range hunting rifle!!