7br?

M

Mram10

New member
I’ve got a 7br reamer I’ve never used and wonder if it’s worth the time over a 6 or 30br? Thanks
 
7br

Mram10 said:
I’ve got a 7br reamer I’ve never used and wonder if it’s worth the time over a 6 or 30br? Thanks
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Only you can answer this question. Build a 7br and decide whether it satisfies your curiosity.

The guy with the most toys wins.:D


Glenn
 
I have played with 7br with bullets in the 85-100 gr area it works great for score especially for 200 it doesn't drift near as much as the 30 br. velocity for a 100gr is 3300 fps. the problem is bullets I made my own but had to pinch jackets and draw them down....
 
As others have said...bullets, bullets, bullets! If you can find some really good bullets for your specific discipline, the cartridge should do very well with them. Same with the 6.5BR stuff but I have to admit, I love the 7mm. Just limited in short range due to bullet choices...very limited, if you can get them at all. The 7's do very well when they can stretch their legs with high bc projectiles and the cartridge is a proven winner. Case efficiency only gets better when it's necked up. So it should be even better than a 6 and better ballistics than a 30 cal based on that case. Go for it!
 
My former gunsmith

used a 7MM HBR rifle for a few years. Made his own bullets and said it shot great. Problem was getting jackets. He gave up but I think he still has the rifle and dies but doubt he's sell them. I've always preferred the 7mm for deer hunting. Had a couple of 284's and 280's, still have a 742-280 but haven't deer hunted in a number of years. Hard to beat either one of those chamberings.

Pete
 
sdean said:
For competition lack of custom bullets is reason enough to stay with 6 or 30.
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Its not the bullets its jackets we can make great bullets in any caliber. Of course if what you said is true we would still be shooting 22's in 222. or flintlocks ;)
 
If someone built a great 90 grain FB that had the same accuracy potential as the 112’s we shoot in a 30 BR, then it would be great in VFS. It still gives up a tad in bullet diameter.

Loaded with a Speer 110 TNT, it should make a great rifle to play around with.
 
geo.ulrich said:
I have played with 7br with bullets in the 85-100 gr area it works great for score especially for 200 it doesn't drift near as much as the 30 br. velocity for a 100gr is 3300 fps. the problem is bullets I made my own but had to pinch jackets and draw them down....
Click to expand...

Noted. Thx
 
mwezell said:
As others have said...bullets, bullets, bullets! If you can find some really good bullets for your specific discipline, the cartridge should do very well with them. Same with the 6.5BR stuff but I have to admit, I love the 7mm. Just limited in short range due to bullet choices...very limited, if you can get them at all. The 7's do very well when they can stretch their legs with high bc projectiles and the cartridge is a proven winner. Case efficiency only gets better when it's necked up. So it should be even better than a 6 and better ballistics than a 30 cal based on that case. Go for it!
Click to expand...

Kinda my thoughts with the bullets. I already have a nice 7mm barrel. I have the 6br and 30br reamers too, so I’m trying to avoid building all three. Time is always limited
 
Pete Wass said:
used a 7MM HBR rifle for a few years. Made his own bullets and said it shot great. Problem was getting jackets. He gave up but I think he still has the rifle and dies but doubt he's sell them. I've always preferred the 7mm for deer hunting. Had a couple of 284's and 280's, still have a 742-280 but haven't deer hunted in a number of years. Hard to beat either one of those chamberings.

Pete
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Thanks Pete.
 
jackie schmidt said:
If someone built a great 90 grain FB that had the same accuracy potential as the 112’s we shoot in a 30 BR, then it would be great in VFS. It still gives up a tad in bullet diameter.

Loaded with a Speer 110 TNT, it should make a great rifle to play around with.
Click to expand...

Copy. Thanks. I’ll decide, build one and let you gents know how it turns out
 
History of the 7BR:
  • "The cartridge was developed for the Unlimited Class in the sport of Metallic silhouette shooting.";
  • "As a hunting cartridge it is adequate for smaller deer species and ranges under 150 yd (140 m).";
  • "Later it was introduced in the Remington Model XB-40 single-shot bolt-action rifle, which was specifically designed for the benchrest shooting community."
Sounds like a fun cartridge! If you build one, enjoy it - it can be used for a lot of activities.

Making Brass
"At one time Remington produced ammunition and cases for this cartridge. They continued to supply the 7mm BR Remington case though to the early 1990s. Today the cartridge is considered obsolete and no one produces loaded ammunition and Remington no longer manufactures firearms chambered for this cartridge."

Okay, new or lightly used brass might be hard to find. However, making brass from 6mm BR is possible. From various websearches, the following should be considered:
  • Necking Up: Depending on whose advice you follow, brass can be necked up in a one or two step process. Some believe necking up in two stages stresses the brass less than a one stage process;
  • Neck Turning: Probably required, as a donut forms when the top of the 6mm case becomes the bottom of the 7BR neck;
  • Annealing: Some feel it may be necessary, due to stress from the necking up process.
Historical note: 6mm and 7mm BR cases apparently work better using small primer cases. The thin walled, small primer, Remington made .308 Winchester cases were originally produced for this purpose,

NOTE: All of the quotes are directly from the information presented in the Wikipedia page at https://en.wikipedia.org/wiki/7mm_BR_Remington.

Hope this helps. FYI, I do not own a 7mm BR.
 
Asa Yam said:
History of the 7BR:
  • "The cartridge was developed for the Unlimited Class in the sport of Metallic silhouette shooting.";
  • "As a hunting cartridge it is adequate for smaller deer species and ranges under 150 yd (140 m).";
  • "Later it was introduced in the Remington Model XB-40 single-shot bolt-action rifle, which was specifically designed for the benchrest shooting community."
Sounds like a fun cartridge! If you build one, enjoy it - it can be used for a lot of activities.

Making Brass
"At one time Remington produced ammunition and cases for this cartridge. They continued to supply the 7mm BR Remington case though to the early 1990s. Today the cartridge is considered obsolete and no one produces loaded ammunition and Remington no longer manufactures firearms chambered for this cartridge."

Okay, new or lightly used brass might be hard to find. However, making brass from 6mm BR is possible. From various websearches, the following should be considered:
  • Necking Up: Depending on whose advice you follow, brass can be necked up in a one or two step process. Some believe necking up in two stages stresses the brass less than a one stage process;
  • Neck Turning: Probably required, as a donut forms when the top of the 6mm case becomes the bottom of the 7BR neck;
  • Annealing: Some feel it may be necessary, due to stress from the necking up process.
Historical note: 6mm and 7mm BR cases apparently work better using small primer cases. The thin walled, small primer, Remington made .308 Winchester cases were originally produced for this purpose,

NOTE: All of the quotes are directly from the information presented in the Wikipedia page at https://en.wikipedia.org/wiki/7mm_BR_Remington.

Hope this helps. FYI, I do not own a 7mm BR.
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Thanks. Wiki can be helpful. I was mainly looking for people’s experience with the cartridge, but again, good knowledge to have
 
Check this now

30 yrs ago i made 100 gr 7mm put on 264 short case on sierra jackets shot in 0nes consistly a shooter from pa jim johnson shot score i also made 163 gr for off hand shillotte on 250 savage case terific
 
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