.284 Reamer question

[Aitch]

I'm building a long range/tactical Using a nice used Obermeyer barrel (~600 down the tube). Smith will recut the tenon and move the chamber forward. I want a match chamber, how do I do this without spending a wad on a one use tool. I'm not cheap but frugal on this build.

 

[Riesel]

I would check into renting a reamer for your smith.

 

[Dusty Stevens]

Find a smith with the reamer you want. Most worth their salt will have more than one 284 reamer.

 

[clowdis]

What bullet do you intend to use? Most reamers that are made for the 175-180 grain bullets have a .187 (or there abouts) throat length to seat the bullet above the neck/shoulder junction. That renders the cartridge unusable in a short action magazine that a lot of tactical shooters use. What action do you have?

 

[shortgrass]

"Match" can mean many different things to many different people. Are you looking for specific neck clearances,or throat length? The throat can be lengthened by using a "throating reamer".

 

[Dusty Stevens]

You can always sell your reamer and the loss you take if you do lose will be cheaper than renting one. Plus you can get exactly what you want where thats doubtful with a rental

 

[butchlambert]

I'm building a long range/tactical Using a nice used Obermeyer barrel (~600 down the tube). Smith will recut the tenon and move the chamber forward. I want a match chamber, how do I do this without spending a wad on a one use tool. I'm not cheap but frugal on this build.

Kinda of an oxymoron!

 

[Aitch]

What bullet do you intend to use? Most reamers that are made for the 175-180 grain bullets have a .187 (or there abouts) throat length to seat the bullet above the neck/shoulder junction. That renders the cartridge unusable in a short action magazine that a lot of tactical shooters use. What action do you have?

It is a Rem 700 LA was 7mm Mag.

 

[Aitch]

What bullet do you intend to use? Most reamers that are made for the 175-180 grain bullets have a .187 (or there abouts) throat length to seat the bullet above the neck/shoulder junction. That renders the cartridge unusable in a short action magazine that a lot of tactical shooters use. What action do you have?

I plan on using 180 g Bergers with necked up 6.5-284 Lapua. Again action is from 7mm Mag Rem 700 LA.

 

[Aitch]

Kinda of an oxymoron!

Thanks for the response, I appreciate your opinion, not sure what you find oxymoronic. Long range/Tactical? I do come here for professional advice and counsel.

 

[Aitch]

You can always sell your reamer and the loss you take if you do lose will be cheaper than renting one. Plus you can get exactly what you want where thats doubtful with a rental

That makes quite a lot of sense. Thank you.

 

[Aitch]

Find a smith with the reamer you want. Most worth their salt will have more than one 284 reamer.

Smith said his reamer is standard .284 Win and not what I need for the 180 g Bergers.

 

[clowdis]

It is a Rem 700 LA was 7mm Mag.

You should be good to go then. Find a 'smith in your area that does some long range work and he'll probably have a proper reamer. Otherwise it's a custom reamer and not usually found in a local 'smith's shop.

 

[butchlambert]

Smith said his reamer is standard .284 Win and not what I need for the 180 g Bergers.

Doesn't your smith have a throating reamer? Will your bolt pull the 284 brass?

 

[dkhunt14]

I plan on using 180 g Bergers with necked up 6.5-284 Lapua. Again action is from 7mm Mag Rem 700 LA.

I believe you will have to get the bolt face reduced. You are talking a mag bolt face to a rebated rim. Probably have to put a Sako extractor in. Matt

 

[Aitch]

Doesn't your smith have a throating reamer? Will your bolt pull the 284 brass?

Good question, I'm afraid I don't know. Smith didn't raise that issue.

 

[clowdis]

Your bolt will definitely require bushing and a new extractor. Shouldn't be too expensive. Cheaper than a new bolt I'd think.

 

[Aitch]

I believe you will have to get the bolt face reduced. You are talking a mag bolt face to a rebated rim. Probably have to put a Sako extractor in. Matt

Again, good observation. The .284 is about .062" smaller.

 

[Aitch]

Your bolt will definitely require bushing and a new extractor. Shouldn't be too expensive. Cheaper than a new bolt I'd think.

Good input, this is my first build and I'm sure I'll learn a lot.

 

[Dusty Stevens]

Long discussions with a proven gunsmith will iron out all the little pitfalls you may run across. I would suggest you sell that action or trade it in on a std boltface action. Your gunsmith will probably have one ready to go or go hit the pawn shops and find a 30-06, 270 cheap