6MM BR Wise Choice mystery cartridge

[SomebodyTookMyName]

I’m currently stripping some awful paint off a barrelled action here, and I found the barrel is marked “6MM BR WISE CHOICE”

Now, I understand Wise Choice is/was a gunsmith out of Ontario, however this rifle is definitely NOT a 6MM BR…

Near as I can tell, the fire cases appear to be a lot closer to a Dasher. Can anyone offer some insight here? Did Wise Choice make a 6MM BR-based wildcat of their own, or is it more likely that someone just ran a Dasher reamer into this thing at some point and never marked it…?

Photo below shows the fired case on the left and a 6MM BR on the right.

 

[dastt]

6br - 6bra - 6 dasher

 

[dastt]

Looks close to a dasher, but hard to say without measuring the brass to know 100%

I feel like the neck is shorter and the shoulder is higher then the one in your picture

 

[SomebodyTookMyName]

View attachment 1123255

6br - 6bra - 6 dasher

Thanks! Looking at my own cases here, the neck looks too stubby to be a BRA.

 

[SomebodyTookMyName]

View attachment 1123266


Looks close to a dasher, but hard to say without measuring the brass to know 100%

I feel like the neck is shorter and the shoulder is higher then the one in your picture

Yeah, I think you’re correct there. Which is unfortunately leading me closer to the weird wildcat theory…

I tried calling Wise Choice’s old phone number- no answer/no voicemail though. I’ll try again on a weekday but I’m not very hopeful.

 

[I Dont Care About You]

Henry Rempel used to make a wildcat called 6MR. Basically it was a 6BR reamer run in deeper. .100 - .150" or thereabouts. Cases were made by cutting down 250 Savage brass.

What is the case head information on those brass?

I had one of Henry's rifles that had originally been built as a Hunter BR rifle. Actually I still have the rifle but it got transplanted into a conventional stock and after a bunch of years I rechambered it to 6BR.

 

[adamg]

Seems more like a Dasher than a BRA, judging by the junctions and sizes at the top half of the case.

Or it might be a BRA that has been trimmed shorter than normal.

 

[moosetaco]

Maybe a 6brx or a 6 dasher.

 

[SomebodyTookMyName]

Henry Rempel used to make a wildcat called 6MR. Basically it was a 6BR reamer run in deeper. .100 - .150" or thereabouts. Cases were made by cutting down 250 Savage brass.

What is the case head information on those brass?

I had one of Henry's rifles that had originally been built as a Hunter BR rifle. Actually I still have the rifle but it got transplanted into a conventional stock and after a bunch of years I rechambered it to 6BR.

I should have mentioned- the case on the left is just a 6mm Norma BR which was fireformed in the rifle.

The shoulder is a good deal steeper after fireforming so it wouldn’t be a 6MR or a BRX either

 

[titch--]

Looks BRA to me, but trimmed short.

 

[SomebodyTookMyName]

Looks BRA to me, but trimmed short.

That case wasn’t trimmed at all though- just a fresh 6 BR case that was fired in my chamber

 

[titch--]

Actually in your pic it aint that much shorter because the BRA one looks a bit lower. But other then that it looks like it lines up with the BRA one that dasst posted

 

[titch--]

Doing this does seems like the shoulder to neck area is a little shorter.

 

[adamg]

This is what a standard 6BRA chamber does when you fire form 6BR brass.
Middle is before firing. Left is after firing.

Fire forming into BRA does make it shorter case, but only by like 15thou.

 

[adamg]

If it was a proper Dasher chamber, the neck -shoulder junction would move forward 80 thou of an inch when fire forming.

 

[guntech]

Oal, neck length, body length, diameters... Anyone heard of a tool called dial calipers? lol