Here is a factory load that has a 300 grain bullet.

http://www.doubletapammo.com/php/catalog/product_info.php?cPath=21_40&products_id=179

I dont think this round is needed on this continent but it would keep down meat damage and certainly ensure penetration.

Considering the 275 swift a frame.....wonder how fast that would be moving......with 250gr should be going about 2900fps....I suppose I can calculate/estimate it.

swift makes the 275gr aframes, but sierra makes a 300gr, but its a match style hollow point bullet, don't think that would be abullet for controlled penetration....

also looks like the 275gr out of the .340 should do about 2750fps.....

If you use Norma MRP with a 250 gr. bullet, you should reach 3000 f/s which will give you 4995 ft/lb. Good luck.

I think you may be over analyzing this a little bit. Bison aren't bullet proof, and definately not tough to kill. As long as you can place a decent bullet in the boiler room, its over in a matter of seconds....

Actually, the 275 Speer is a semi-point, and it was a BIG seller in my area, i still have some of them... I personally used them on brown bear and other big game, and IMHO it's one of the best DG .338 bullets i've used... That is, out of a .338-06 and .338 Win. mag... Never used them out of my 340 on game...

Winchester did sell there 300 grain bullet for reloading too, as i had some of them up untill last year when i sent them to a guy in Canada...

I've used a lot of different lighter .338 bullets, and in my experience, 250's on up should used on the biggest animials...

About those Sierra's: I've used two of the variations that Sierra has made on there 250 grain .338's, and i personally wouldn't use it on DG. The early ones were too soft, and the later ones although tougher were over shadowed by NP's in that weight. The softer "early"250's, sure are big medicine for long range caribou though!

Doesn't Woodleigh (sp?) still offer a 275 grain?

DM

Does anyone have a swift reloading manual or can determine a load configuration for the .340wby with 275gr swift a frames?

According to the "Speer Reloading Manual #12"
.340 Wby. Mag.caliiber
.338 cal. 275 gr. bullet
IMR 7828 powder MIN:84.0grs. VEL: 2601f/s;MAX: 88.Ogrs. VEL: 2748f/s.
DON'T FORGET TO START AT MIN. !!

Good luck.