.22 CCM / .22 Cooper Centerfire Magnum (Accurate Loading Guide #2)

.22 CCM / .22 Cooper Centerfire Magnum (Accurate Loading Guide #2)

The .22 CCM, also known as the .22 Cooper Centerfire Magnum, was developed by Ken Cooper as an enhanced performance version of the .22 Hornet / .22 centerfire cartridges. It attempts to bridge the gap between light .22 varmint rounds and more powerful magnum cartridges by offering higher velocity with reasonable recoil. The data from *Accurate Loading Guide #2* provides modern load recipes tuned for precision, reliability, and manageable pressures.

In the guide, bullet weights span 35 to 55 grains, depending on the intended use—lighter bullets for speed and heavier ones for wind-bucking performance. Powders like Benchmark, IMR 8208 XBR, and Accurate’s proprietary propellants are recommended for their stable metering and clean-burning characteristics, which suit the moderate case capacity of the CCM design. The load tables show how each bullet and powder pairing performs in terms of velocity, pressure margins, and expected accuracy under standard test barrel conditions.

The design philosophy behind the CCM stresses component consistency and precision load development. The guide emphasizes the importance of trimming to uniform length, consistent neck wall thickness, annealing, and precise seating depth. Small jumps or variations in overall length (even just .005 to .010 inch) are documented as having noticeable effects on accuracy and pressure, so the guide advises methodical incremental work-up procedures backed by chronograph validation.

Because the CCM is more ambitious than standard .22 cartridges — moving into magnum territory in a petite case — the guide also includes safety margins and cautions about throat erosion and barrel heating. For sustained use, some loads in the guide are deliberately held at or below 90–95 % of the published maximums to maintain accuracy longevity and reduce wear. This conservative approach helps prevent early throat erosion while still tapping high-performance capability.

Practically, the .22 CCM / Cooper Centerfire Magnum as presented in the Accurate Loading Guide #2 offers handloaders a versatile and high-performing option for both varmint hunting and long-range shooting. It’s particularly attractive to those who want to push the edge of .22-caliber performance without stepping up to massive magnum cartridges. With careful development, it promises tight groups, consistent velocities, and a balance of power and finesse.

Source: Wolfe Publishing & Accurate Loading Guide #2