Re: Your Next Rifle Will Be In Which Cartridge
7mm Allen Magnum
Kirby Allen's creation, here's some
Info from his website.
Parent Case: 338 Lapua Magnum, Fully Formed cases available with rifle orders from APS.
Recommended Bullets: 140 and 160 gr. Accubonds, 175 gr. Sierra Matchking, 180 gr. Berger VLD and 200 gr. ULD RBBT Wildcat Bullet.
Recommended Powders: H-Retumbo, WC-860, WC-872
Recommended Primers: Federal 215 Large Rifle Magnum
Bullet WeightVelocity (30" barrel length)
140 gr.3700 fps
160 gr.3550 fps
175 gr.3450 fps
180 gr.3400 fps
200 gr. (custom) 3300 fps
Bullet Weight: 160 gr Accubond @ 3550 fps, 250 yard zero, 10 mph
4002870fps6.7" 2927ft/lb 0.376
Bullet Weight: 200 gr. ULD RBBT @ 3300 fps, 250 yard zero,10mph
4002910 fps4.2"3759ft/lbs 0.387
Recommended Uses: The 7mm Allen Magnum was the first APS wildcat to step away from the Remington Ultra Magnum parent case in favor of a slightly shorter and fatter design based on the 338 Lapua Magnum parent case. The reasons for this change are for the slightly larger case capacity but mainly due to the dramatically increased strength of the Lapua case allowing it to handle pressures far exceeding anything the RUM case can survice and do so with long brass life with top loads. The 7mm Allen Magnum is also the first APS wildcat that is designed and fully capable of harvesting game up to 1000 pounds at long range. With the use of the 200 gr. ULD RBBT Wildcat Bullet, nothing else will match the ballistic performance of the 7mm Allen Magnum unless you step up to the wildcats based on the 408 Chey Tac parent case.
Using 140 to 160 gr. Accubonds, the 7mm AM is simply amazing on deer size game up to 400 pounds. For light weight sporter rifles, these lighter bullets produce lower levels of recoil yet retain plenty of terminal performance for medium big game hunting.
Effective Range: T he 140 gr. and 160 gr. Accubonds are fully capable of cleanly harvesting small and medium big game at ranges up to and even exceeding 800 yards. In ideal conditions these bullets retain plenty of velocity, energy and accuracy to harvest medium game out to 1000 yards.
The 175 gr. Sierra MK, 180 gr. Berger VLD and 200 gr. ULD RBBT Wildcat Bullet are fully capable of harvesting deer size targets at ranges WELL past 1200 yards. Referring to the velocity performance chart above, the 200 gr. ULD RBBT retaines well over 2200 fps and nearly 2200 ft/lbs of energy at 1200 yards!!! While this level of performance is enough to harvest elk size game at this range, it is still recommended that elk size targets be held to 1000 yards max with the 7mm Allen Magnum. This is mainly due to the relatively small frontal area of the 7mm bullet.
Pros : Fully formed brass available from APS with rifle orders. Can be used with powders that are very stable over wide temp changes, Extreme ballistic and terminal performance, limited recoil, relatively short over all length works in standard length receivers and magazine boxes.
Cons : Somewhat limited barrel life (plenty long enough for a career of big game hunting). Large diameter Lapua parent case requires receivers designed for this class of chambering. Best bullet for this chambering is the 200 gr. ULD RBBT which is a custom bullet made by Wildcat Bullets. This bullet is in production at this time but as a custom bullet availability can be a slight issue.
" Long distance shooting is an art, often meaning something you have mastered through innate aptitude or long range practice versus a simple application of science" .................Jeff Hoffman