Re: edge vs ultramag is there any difference
B23, Thanks for your post. I am saying there is more difference in the accuracy loads of each individual rifle than there is between the 338 ultramag and 338-300 ultramag. I have seen each faster than the other with best accuracy loads. I have shot both extensively on the range over a chronograph and at big game. No hunter would ever no the difference shooting at game with either and neither would any big game animal. 90% of accuracy loads with either of these two cartridges will shoot 2750-2850 fps with a 300 grain bullet.
If anyone is even the least bit concerned with whatever slight difference there might be in velocity they are looking at the wrong cartridge with either of these ultramags. They would need to get a custom big 338 off the 378 wby or 416 rigby case and jump either of these near 300 fps on average (3100+fps). Then I assure any shooter from experience they will notice an extreme difference from the ultramag cartridges. If someone thinks 2-4 grains of powder in an accuracy load is going to make that much difference between the ultramags (91-94 grains) they need to think logically about what up to 130 grains of powder will do in the improved 378 wby or 416 rigby case. I just finished an alaskan safari using only the 338 winchester to take grizzlies to sheep so I am not trying to push these huge capacity 338's on anybody. Just for the velocity buffs who talk velocity all the time, they need to look at the 378 or 416 case if that is there criteria. They don't need to spend there time arguing two virtually identical cartridges.
Again, I don't care what a guy shoots or even if it is a 338 or not. I have numerous wildcats in all calibers and have taken big game animals in excess of 1000 yards with 270, 7mm, 30 and 338 calibers. But I do want a guy to make his choices with clear unbiased information from someone with many years experience shooting big game with about everything out there. I have taken big game all over north america with probably every 338 regularly discussed on this forum or for sure a comparable one. I am not going to hang my hat on one. But basically from experience I end up taking my 338 winchester that weighs 7 1/4 pounds scoped out if I am shooting under a half mile. For extreme long range I shoot a big 338 off the 378 wby case with a 300 smk over 3100 fps and weighs 10 3/4 pounds. But a guy may see me hunting with about anything. I have plenty of choices in the rack.
Predictions are difficult, especially when they involve the future
Last edited by Long Time Long Ranger; 09-17-2010 at 10:46 AM.