7 rum vs 28 nos

[jlvandersnick]

I need to rebarrel what was a 7rum. I bought the gun used from a guy that was not honest with me about the barrel. He had gotten it real hot and it has bad firecracking starting a few inches ahead of the breech almost to the muzzle. The throat still looks really good...which surprised me. Anyway it's time for a new barrel

I already a have a 28 nos that I built as a carry gun. At just under 9.75 lbs with scope it carries nice and shoots the 195's very well at 3056 fps. Coal is 3.735

So with this with this rebarrel... I am not at all worried about weight. It will be a truck and range gun. Thinking about a 5r barrel that is 32 inches and straight contour at 1.25 to the end. Also considering one that ends at 1 inch at 32. but leaning towards the heavier one.

The action is a Pierce .

I already have all the RUM components....lots of brass, including 100 pieces of new unfired Norma, 100 pieces of mostly once fired R-P and a lot of 195s. I have 8 lbs of retumbo and 8 lbs of n570. Also have a redding competition loading die set.

So I have a few reasons to go with the 7 RUM.

There are some very knowledgeable people that believe that there is no reason to go with a rum as it just can't do anything more than a 28. Data seems to show that the rum would drive the 195s about 150 to 200 fps faster than a 28.

Would love some real-world experience. Thanks

 

[ebb]

I love my 7 RUM and have no desire to detune it to a 28 Nosler or anything else. You already have most of the parts and pieces for the RUM, why make it more work and expense than it needs to be?

 

[JLT]

I love my 7 RUM and have no desire to detune it to a 28 Nosler or anything else. You already have most of the parts and pieces for the RUM, why make it more work and expense than it needs to be?

Sound reasoning.

 

[jnm300ultra]

I like the 7 Rum since you already have a carry 28 Nosler. I sure like the extra speed they say you would get. Also having all the parts and components for the Rum. I would look at the 1” barrel @ 30”. Having a 32” barrel straight contour is like hunting with a F Class rifle, the stock and scope weight would be about the same as a bench rest stock as a McMillan with hardware.
Good luck with with your new build.
Jason

 

[ebb]

If you decide to go with a 28 let me have first dib's on the 7RUm brass

 

[David Milisock]

I need to rebarrel what was a 7rum. I bought the gun used from a guy that was not honest with me about the barrel. He had gotten it real hot and it has bad firecracking starting a few inches ahead of the breech almost to the muzzle. The throat still looks really good...which surprised me. Anyway it's time for a new barrel

I already a have a 28 nos that I built as a carry gun. At just under 9.75 lbs with scope it carries nice and shoots the 195's very well at 3056 fps. Coal is 3.735

So with this with this rebarrel... I am not at all worried about weight. It will be a truck and range gun. Thinking about a 5r barrel that is 32 inches and straight contour at 1.25 to the end. Also considering one that ends at 1 inch at 32. but leaning towards the heavier one.

The action is a Pierce .

I already have all the RUM components....lots of brass, including 100 pieces of new unfired Norma, 100 pieces of mostly once fired R-P and a lot of 195s. I have 8 lbs of retumbo and 8 lbs of n570. Also have a redding competition loading die set.

So I have a few reasons to go with the 7 RUM.

There are some very knowledgeable people that believe that there is no reason to go with a rum as it just can't do anything more than a 28. Data seems to show that the rum would drive the 195s about 150 to 200 fps faster than a 28.

Would love some real-world experience. Thanks

I have worked with several guys who had the Ultra Mags, in 7, 30 and larger. In my opinion they are wonderful cartridges. What you discuss is common, I've seen new rifles ruined on the first range visit. I find rifles in these cartridges to be singularly reach out and touch you from a long way rifles so a quality rifle is needed to take advantage of the cartridge.

This is not an inexpensive situation nor it it something done quickly, you need a baseline for control and the high powder volume causes concern for rate of fire!! Many of these rifles have thin barrels for their case volume.

In my opinion if you need or want the reach, rebarrel to 7MM RUM cut to a specific projectile weight. Buy at least 2 boxes of factory rounds in that weight as a sight in load control. Fire 2 rounds no sooner than 20 seconds, to zero, clock the loads if you have a chronograph, (clocking recommended for safety at high pressures). Let the rifle rest and cool, make 20 minutes, make your sight adjustments and fire 2 more. Repeat the process, on hot days you may need all day or multiple range sessions to get a cold bore zero. Now you have a solid base line for loading. Also you should have some left over ammo to use for a hunt until you take the time necessary to work great loads. In the end you have a rifle shooting known, two shot cold bore accuracy with factory ammo.

I suggest plenty of load research, work your loads on hot days, give thought to only using magnum rifle primers, do your test firing in the same manner as you did with factory loads. I've actually save targets to repost so I could accumulate 10 to 15 shot groups over multiple range sessions. In the end you'll have great ammo, (less expensive than factory) in a rifle that will give you 2 or maybe more shot cold bore accuracy.

I personally have a custom 358 Norma Magnum that places 3 shots in 1 1/16" at 300 yards, if I keep the target posted and shoot through the day it keeps all the shots in the same group size. I took 2 elk with it 400+ and 600+ yards, one shot one kill.

 

[Zero333]

If you're already set up for the 7 RUM then I see no reason to waste more money on the 28 Nosler.
KISS.