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Old February 19, 2012, 10:59 AM   #15
taylorce1
Senior Member
 
Join Date: November 18, 2005
Location: On the Santa Fe Trail
Posts: 8,209
Kraigwy,

I have seen these bullets talked about on other forums and I think you have to have a 1:9 twist or faster to use them. Kirby Allen makes his .270 Allen Magnum and uses bullets like these to run in it.

Quote:


The current big names in the 270 family of wildcats. Left to Right: 270 Winchester, 270 Weatherby case, 270 Allen Magnum, 300 RUM (parent case of 270 A.M). The 270 A.M. dramatically exceeds anything remotely possible with the 270 Weatherby Magnum.

Parent Case: 7mm or 300 Remington Ultra Magnum (fireformed brass available with rifle orders)

Preferred Bullets: 130 and 140 grain Accubond, 130, 140 and 150 grain Ballistic Tips, 169.5 gr ULD RBBT Wildcat.

Recommended Powders: Ramshot Magnum, H-US896, WC-860 and WC-872

Recommended Primers: Federal 215 Large Rifle Magnum

Velocity Performance:
Bullet Weight Muzzle Velocity(30" barrel length)
130 gr. 3750 fps
140 gr. 3650 fps
150 gr. 3550 fps
169.5 gr. (custom) 3450 fps

Ballistic Performance:
Bullet Weight: 130 gr. Accubond @ 3750 fps, 250 yard zero, 10 mph

Yardage velocity wind drift Energy TOF(sec)
400 2897fps 7.8" 2423 ft/lbs 0.364
600 2529 18.7" 1845 0.586
800 2189 35.4" 1383 0.841
1000 1878 59.3" 1018 1.137

Bullet Weight: 169.5 gr. ULD RBBT @ 3450 fps, 250 yard zero,10mph

Yardage velocity wind drift energy TOF
400 2963 fps 4.9" 3313 ft/lb 0.375
600 2739 11.3" 2831 0.586
800 2526 20.9" 2409 0.814
1000 2323 33.8" 2037 1.061
1200 2130 50.7" 1713 1.331

Recommended Uses: The 270 Allen Magnum was designed specifically for the use of hunting medium big game in the 200 to 600 pound class. The 270 A.M. is also the first APS wildcat that offered legit +1000 yard effective range on medium big game animals as it sustains over 1 ton of kenetic energy at 1000 yards. It also retains up to 2300 fps at this range which ensures full bullet expansion and energy transfer. The 270 A.M. is a true all around performer. Its just as at home in a lightweight sporter rifle for packing all day in rough country and hunting out to 700 yards, or as a medium weight rifle for dedicated long range precision big game hunting. While the barrel life of the 270 Allen Magnum is dramatically longer then its smaller Allen Magnum siblings, its still not recommended to use this wildcat as a high volume varmint chambering.

Effective Range: With commerical bullets, the 270 A.M. is best used at ranges from zero to 800 yards on medium size game. For elk hunting it is recommended that range be limited to no more then 600 yards with conventional commerical bullets. Using the 169.5 gr ULD RBBT from Wildcat Bullets, the 270 Allen Magnum offers legit +1200 yard range on medium to heavy deer species and 1/2 mile range on elk size targets.

Pros: Very easy to form brass for, formed brass available through APS with rifle orders, Extremely potent ballistic and terminal performance. Decent barrel life for performance level. Fits in Rem 700 receivers easily and its custom clones.

Cons: Commerical bullets really limit the 270 A.M.s performance potential. Custom 169.5 gr ULD RBBT not easily obtained from Wildcat Bullets but it is still listed as a production item. Relatively limited choice in reloading powders.
http://apsrifles.com/Allen_Magnum_Wildcats.html
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