Forums
New posts
Search forums
What's new
Articles
Latest reviews
Author list
Classifieds
Log in
Register
What's new
Search
Search
Search titles and first posts only
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Forums
Hunting
Long Range Hunting & Shooting
338 Edge and 338 Lapua AI numbers
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="Long Time Long Ranger" data-source="post: 429285" data-attributes="member: 505"><p>B23, My go to 338-378 wby has a 28" Hart barrel and shoots the 300 smk 3060 fps with best accuracy. My go to 338 Lapua Imp had the same barrel and shot just under 3000 fps. On average 80-100 fps slower. From when I developed the 338-300 ultramag in 1998 until 2001 when the 338 RUM came out I did around 100, 338-300 ultras. Best accuracy in those was 2750-2850 fps with a 300 smk and any kind of brass life. During the 90's I worked with several top people around the country trying to develop the best lapua imp. The ones with the shoulder pushed forward and sharper shoulder angles than the standard lapua performed the best. The big 338's just don't gain much velocity per inch so I expect you would see that 80 fps difference from 26"-30" barrels with the lapua imp and the 338-378. So basically you just get down to the fact there is not a lot of difference. But they are a definite step up above the 338-300 ultramag or edge. </p><p></p><p>3006savage hit the nail on the head. Bottom line is the 338-378 wby is faster than the others and just as accurate. That gives you more play room. If a guy spends a lot of money for a custom build on say a 338-300 ultramag or edge some call it and the accuracy load is not on the top end of the scale there could be 300 fps difference than if he had built a 338-378 wby. That is a lot of fps. Could get a really fast 338-300 ultra and a really slow 338-378 and only be 100 fps difference between the two. But playing averages it will be about 200 fps difference. If I am doing serious long range work I am not limiting myself 200 fps when it is extremely difficult to judge wind at different velocities across a long canyon shot. The ultramag based stuff can shoot long range. The 338-378 and 338 lapua imp can do it better.</p></blockquote><p></p>
[QUOTE="Long Time Long Ranger, post: 429285, member: 505"] B23, My go to 338-378 wby has a 28" Hart barrel and shoots the 300 smk 3060 fps with best accuracy. My go to 338 Lapua Imp had the same barrel and shot just under 3000 fps. On average 80-100 fps slower. From when I developed the 338-300 ultramag in 1998 until 2001 when the 338 RUM came out I did around 100, 338-300 ultras. Best accuracy in those was 2750-2850 fps with a 300 smk and any kind of brass life. During the 90's I worked with several top people around the country trying to develop the best lapua imp. The ones with the shoulder pushed forward and sharper shoulder angles than the standard lapua performed the best. The big 338's just don't gain much velocity per inch so I expect you would see that 80 fps difference from 26"-30" barrels with the lapua imp and the 338-378. So basically you just get down to the fact there is not a lot of difference. But they are a definite step up above the 338-300 ultramag or edge. 3006savage hit the nail on the head. Bottom line is the 338-378 wby is faster than the others and just as accurate. That gives you more play room. If a guy spends a lot of money for a custom build on say a 338-300 ultramag or edge some call it and the accuracy load is not on the top end of the scale there could be 300 fps difference than if he had built a 338-378 wby. That is a lot of fps. Could get a really fast 338-300 ultra and a really slow 338-378 and only be 100 fps difference between the two. But playing averages it will be about 200 fps difference. If I am doing serious long range work I am not limiting myself 200 fps when it is extremely difficult to judge wind at different velocities across a long canyon shot. The ultramag based stuff can shoot long range. The 338-378 and 338 lapua imp can do it better. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Hunting
Long Range Hunting & Shooting
338 Edge and 338 Lapua AI numbers
Top