Re: NEW 338 Allen Magnum Xtreme Heavy Sporter for sale
The rifle was actually built with a throat set up for the 300 SMK set at an OAL of around 4.250". Interestingly enough, the 265 gr Barnes TTSX has a very similiar bullet length and ogive length compared to the 300 gr SMK.
Being a single shot, this throat will also work extremely well with the Berger 300 gr Hybrid, in fact with this bullet, it would be seated out around 0.100" farther out of the case then the SMK or Barnes so you can generally pick up a bit more velocity with the Berger compared to the SMK. The Berger also has a bit shorter baring surface so that also frees up a bit more velocity.
On averge you will see around 50-75 fps more velocity with the Berger then the SMK.
In short, this rifles throat would be ideal for any of the following bullets:
265 gr Barnes TTSX
280 gr Barnes TTSX
285 gr Hornady HP match
300 gr SMK
300 gr Berger
300 gr Accubond
Any of the Rocky Mountain bullet
Pretty much any bullet over 265 grains would work perfectly will in this throat and offer full performance.
In testing the 300 gr Accubond, I have found that because of its VERY long baring surface, its a relatively slow bullet compared to same weight match bullets. It will on average run 50-75 fps slower then the SMK in most rifles. This is not a real bad thing if your needing the terminal performance of a bullet such as the Accubond, a 300 gr Accubond loaded to 3225 to 3250 is one hell of a potent big game hammer.
Allen Precision Shooting
Home of the Allen Magnum, Allen Xpress and Allen Tactical Wildcats and the Painkiller Muzzle brakes.
Farther, Faster and Flatter then ever before.
Web Page: www.apsrifles.com