7RM or 7mm/300 win

[mrb1982]

I am curious how long you guys wait between shots? I found when I was working up my last load with 168's that if I didn't take a 2-3 minute break between shots that it had a significant amount of affect.

 

[WildRose]

I am curious how long you guys wait between shots? I found when I was working up my last load with 168's that if I didn't take a 2-3 minute break between shots that it had a significant amount of affect.

Working on a hunting load once I've got a load I like I'll shoot three rounds in under a minute then let it cool down completely before shooting it again.

The reason being once I have a load I like I want to see how it would perform under hunting conditions and the maximum you are likely to get on any game animal at any range is three shots 99% of the time.

Other than that my rule is no more than three shots in any given 5 minute period and I let it cool down completely between strings.

 

[mrb1982]

I guess my routine at this point has been shooting 4 shot strings in testing with 2-3 min break between shots before I address the gun and get ready to shoot again. Then usually I have a little more time between groups walking down to change my target and whatnot. Kinda depends on how warm it is too I guess

 

[mrb1982]

Since we have veered a little toward conversation beyond the 7/300, there is one 7mm caliber I haven't thought of off hand and that's the 7LRM. What is every bodies take on that? Performance wise sounds good. Is there a barrel life problem? Tell me what you're thinking.

 

[WildRose]

Since we have veered a little toward conversation beyond the 7/300, there is one 7mm caliber I haven't thought of off hand and that's the 7LRM. What is every bodies take on that? Performance wise sounds good. Is there a barrel life problem? Tell me what you're thinking.

Barrel life should not be a problem.

Personally I don't want to own any calibers that I have limited sources for loaded ammo or brass. That would be the only downside.

Personally I'm really interested to see how the wildcatters do with 26 Nosler Brass and necking it down to 7mm. I also expect Nosler to come out with the same in a SAAMI Spec'd factory round in the next two years along with the same in 30 cal.

 

[mrb1982]

Yeah the brass thing is a good point. Kinda generally why I like to stick to the conventional calibers I guess.

Might have to just bite the bullet and take this 300RUM Rem BDL off my buddy's hands and build a 338 Edge just to play with and call it good. lol

 

[TMR]

A few other things to consider here as well. Comparing apples to apples here there is roughly 100fps between a 28" 7RM and a 28" 7/300WM. Having shot both on paper at 1k, there is roughly 10" of elevation, and only 2-3" of wind difference. That is .25moa at 1k on the wind. All of the 7RM's I have built run 180's at 3000 in 26" barrels, 3050 in 27" barrels and right at 3100 in 28" barrels. The 7/300's have run 3100 in 26" barrels and 3160-3200 in 28" barrels. Since most of the use of these rifles is 1k at less on animals, the windage difference is really a mute point. Yes, it does shoot flatter, but how often are we off on elevation? In my opinion, the 7RM should have been built on the 300WM case, but it wasn't. Now, when the 195's come out, the added boiler room of the 300WM case may help. We won't know until some starting flying, but it also may end up being the same 100fps separation.

This leads me to the next point......do you ever plan on hunting out of the states with the rifle? Most countries are starting to require headstamps to match the barrel engraving. From what I have been told, Canada and Mexico are hit or miss depending on the custom's agent, Africa it needs to match, NZ needs to match, etc. Something else to consider.

Keep in mind this is coming from a 7mm fanatic as well.

 

[yobuck]

I havent read all the pages of these posts. To the original question however there would be a couple that would be worth persuing in my opinion. One woud be the 7 stw and the other the 7x300 weatherby. The 7x300 weatherby is the oldest of the 2 but since the stw became a factory offering it is more popular. Both would offer the same balisticly. With a 7x300 weatherby you simply run a 300 weatherby case thru a 7x300 die. No fire forming involved. Bullet for bullet your gain will be about 300 fps over a standard 7 mag. I run 80 gr 7828 w/ a 162 hornady in mine. The 162 is better for trajectory than the 180 berger in my gun to 1200 yds. Thats the max i feel comfortable shooting at deer with the 7mm anyway. Back in the 70s i bought a rem 40x in 7 mag. At the time i already had a 7x300 weatherby on a custom action heavy gun. I shot a buck with the 40x at about 750. It was a good hit just behind the shoulders. The following year the gun had been rechambered to 7x300 weatherby.
Theres where the differences start to show up. If your gonna do it go stw or use the 300 weatherby case. Another option however would be to use the 340 weatherby case as bruce baer does with the 284 baer.

 

[mrb1982]

A few other things to consider here as well. Comparing apples to apples here there is roughly 100fps between a 28" 7RM and a 28" 7/300WM. Having shot both on paper at 1k, there is roughly 10" of elevation, and only 2-3" of wind difference. That is .25moa at 1k on the wind. All of the 7RM's I have built run 180's at 3000 in 26" barrels, 3050 in 27" barrels and right at 3100 in 28" barrels. The 7/300's have run 3100 in 26" barrels and 3160-3200 in 28" barrels. Since most of the use of these rifles is 1k at less on animals, the windage difference is really a mute point. Yes, it does shoot flatter, but how often are we off on elevation? In my opinion, the 7RM should have been built on the 300WM case, but it wasn't. Now, when the 195's come out, the added boiler room of the 300WM case may help. We won't know until some starting flying, but it also may end up being the same 100fps separation.

This leads me to the next point......do you ever plan on hunting out of the states with the rifle? Most countries are starting to require headstamps to match the barrel engraving. From what I have been told, Canada and Mexico are hit or miss depending on the custom's agent, Africa it needs to match, NZ needs to match, etc. Something else to consider.

Keep in mind this is coming from a 7mm fanatic as well.

Some pretty good info there. This is kinda one of those splitting hairs things probably. I may quiet possibly never know the difference either way. Probably just a mind game thing wit h myself more than anything.

The international thing is kinda irrelevant to me, but it is some really good info for future reference.

 

[idaho elk hunter]

A few other things to consider here as well. Comparing apples to apples here there is roughly 100fps between a 28" 7RM and a 28" 7/300WM. Having shot both on paper at 1k, there is roughly 10" of elevation, and only 2-3" of wind difference. That is .25moa at 1k on the wind. All of the 7RM's I have built run 180's at 3000 in 26" barrels, 3050 in 27" barrels and right at 3100 in 28" barrels. The 7/300's have run 3100 in 26" barrels and 3160-3200 in 28" barrels. Since most of the use of these rifles is 1k at less on animals, the windage difference is really a mute point. Yes, it does shoot flatter, but how often are we off on elevation? In my opinion, the 7RM should have been built on the 300WM case, but it wasn't. Now, when the 195's come out, the added boiler room of the 300WM case may help. We won't know until some starting flying, but it also may end up being the same 100fps separation.

This leads me to the next point......do you ever plan on hunting out of the states with the rifle? Most countries are starting to require headstamps to match the barrel engraving. From what I have been told, Canada and Mexico are hit or miss depending on the custom's agent, Africa it needs to match, NZ needs to match, etc. Something else to consider.

Keep in mind this is coming from a 7mm fanatic as well.

Watch out what you say on this forum many will doubt you on these velocities with the old 7mm rem. If you nitride the barrel and hex coat the bullets and barrel, especially a tight barrel you with a .025 freebore and n579 you can get even higher velocities by about 100 fps. OR more ,,,175 Accubond Long Range

 

[TMR]

Watch out what you say on this forum many will doubt you on these velocities with the old 7mm rem. If you nitride the barrel and hex coat the bullets and barrel, especially a tight barrel you with a .025 freebore and n579 you can get even higher velocities by about 100 fps. OR more ,,,175 Accubond Long Range

The velocities were questioned once before as well, hell, I provided a couple guys with lists of customers to ask. N570 an rl33 will get a guy a little more velocity but not sure it's worth it. Testing with rl33 to see about barrel life now, what I do know is that it's dirt in this size case. N570 would have been better if the supply wouldn't have dried up.

 

[mrb1982]

I am shooting H 1000 right now and I have about 2 and a half lb of it yet so I am gonna stick with it for now. Out of curiosity TMR, you got any thought on what kind of velocity I can expect in a 26" Sendero in a 7 RM? If I can get 2900 I will be pleased and anything over that will just be gravy probably. Does this seem like a reasonable possibility out of a factory barrel?

 

[TMR]

2900 seems to be about max on the factory guns.

 

[MudRunner2005]

I am shooting H 1000 right now and I have about 2 and a half lb of it yet so I am gonna stick with it for now. Out of curiosity TMR, you got any thought on what kind of velocity I can expect in a 26" Sendero in a 7 RM? If I can get 2900 I will be pleased and anything over that will just be gravy probably. Does this seem like a reasonable possibility out of a factory barrel?

If you shoot the Berger 168 VLD's, you can get over 3,000 no problem with 7828 SSC. I use that combo for my whitetail hunting load. Pretty devastating.