Long Range Hunting Online Magazine

Go Back   Long Range Hunting Online Magazine > Hunting > Long Range Hunting & Shooting

Long Range Hunting & Shooting Nightforce Optics


338 Rum velocity question

LinkBack Thread Tools Display Modes
Unread 01-11-2012, 11:25 PM
Platinum Member
Join Date: Feb 2007
Location: Townsend, Montana.
Posts: 8,652
Re: 338 Rum velocity question

Originally Posted by lamiglas View Post
Was hoping you would reply. In that barrel length do u think he woulg gain anything going with an edge?
Yes, close to 100 fps depending on the freebore. But th Rum will do ya fine too.

Reply With Quote

Unread 01-11-2012, 11:47 PM
Junior Member
Join Date: Oct 2008
Location: northwest montana
Posts: 22
Re: 338 Rum velocity question

I'm getting 2780 out of a 28" barrel running 90.5 gr of Retumbo with 3.670 COL. Those velocities were cross checked out to 1320 yards with the Bulletflight program.
Reply With Quote
Unread 01-12-2012, 12:05 AM
Gold Member
Join Date: Mar 2008
Posts: 603
Re: 338 Rum velocity question

Thanks alot guys, appreciate the feedback. He is struggling on which to build now because in the near future he is going to build a defensive edge canyon rifle. Currently he has a ton of 338rum brass,dies etc, so building an edge would involve additional start up costs. My vote is to build this one into an edge and later the canyon rifle so he will have a matched set? with those circumstances, what would you do? he is not a member but he is on here at least a half hour every day so he will see your responses. Thanks again
Reply With Quote
Unread 01-12-2012, 01:46 AM
Platinum Member
Join Date: Mar 2002
Location: Wyoming
Posts: 2,612
Re: 338 Rum velocity question

You will not notice a difference between the 338 RUM and 338-300 RUM in accuracy, shooting or hunting. If you hunted with the 338-300 RUM one year and the next hunted with the 338 RUM in identical rifles you would not be able to tell the difference in any way performance wise. After extensive testing back in 2001 when the 338 RUM came out they proved to be so close the individual barrels made more difference than the cartridges. They shoot virtually the same accuracy loads and velocities. That is why I quit doing the 338-300 RUM in 2001 when the 338 RUM came out. I just went with the factory cartridge after doing the 338-300 RUM since late 98 or so. Most accuracy loads in either cartridge will average 2735-2785 fps in a 26" barrel.

There is about a ten grain powder difference between the 340 wby and 338-300 RUM to gain about 125 fps. There is about a 16 grain powder difference between the 338-300 RUM and the 338-378 wby to gain about 250 fps. Both the 338 RUM and the 338-300 RUM shoot accuracy loads of 91-93 grains of H-1000. How much velocity difference do you think there will be?
Predictions are difficult, especially when they involve the future
Reply With Quote


Thread Tools
Display Modes

Similar Threads for: 338 Rum velocity question
Thread Thread Starter Forum Replies Last Post
Velocity question?s darrindlh Reloading 36 03-31-2015 04:35 PM
.280 AI velocity question vendetta333 Reloading 5 01-05-2012 05:07 PM
Velocity question newmexkid Reloading 1 10-11-2011 12:28 PM
velocity question paphil Rifles, Bullets, Barrels & Ballistics 0 03-12-2011 10:03 AM
Velocity question johnnyk Reloading 7 05-12-2007 05:24 AM

All times are GMT -5. The time now is 09:24 AM.

All content ©2010-2015 Long Range Hunting, LLC