Little background… some of you have seen it in the classifieds. But along with the firearms I bought the other day I got 2 factory boxes of Federal 6mm Remington and a range box with what looked to be 6mm Remington reloads; about 60 of them and some spent cases in the box. I thought this makes sense since there’s a nice Remington 700 in that caliber in the collection of guns I bought. With my experimenting trying to figure out the chambering of the Mystery Mauser I got a wild hair and decided to take a spent case from that ammo box and chamber it in the Remington 700 I have that’s chambered in 6mm Remington. To my surprise It would not chamber.. at all. I thought that was extremely weird.
So I took a factory 6mm Rem round… and it chambered as it should
Then I took one of those 6mm Rem reloads and it WOULD NOT chamber in the Remington. I thought what the hell… got my calipers and my reloading manual out. Looks like 6mm Rem is allowed a COL of 2.825. These reloads are 2.935. I’m somewhat familiar with chasing the lands because for my .308win RPR I load the COL a little longer than manual states but this seems outrageously long though.
From what I can tell the chamber must be pretty ‘loose’ in the Mauser for the brass to expand that much too.
(I may be wrong on the above statement and the following statement I am about to say too.)
The diameter of the factory loaded brass is .462 the diameter of the spent casing is .468. Obviously there should be some size difference since the spent brass isn’t sized but anyways I’ll continue… I’m still a newbie to this sort of stuff.
I’ve already took the 6mm Rem spent cases and they chamber in the Mystery Mauser fine. The factory ammo I have chambers fine and I took the reloaded round to the Mystery Mauser and it chambers fine. This chambering must be pretty open for a round with a COL of 2.935” to chamber easily.
I’m in the 90-100% certain range that this Mauser is chambered in 6mm Rem. It appears the reloads are not for the Remington 700 though which really surprises me.
This is my assumption without casting the chamber. Thoughts?
So I took a factory 6mm Rem round… and it chambered as it should
Then I took one of those 6mm Rem reloads and it WOULD NOT chamber in the Remington. I thought what the hell… got my calipers and my reloading manual out. Looks like 6mm Rem is allowed a COL of 2.825. These reloads are 2.935. I’m somewhat familiar with chasing the lands because for my .308win RPR I load the COL a little longer than manual states but this seems outrageously long though.
From what I can tell the chamber must be pretty ‘loose’ in the Mauser for the brass to expand that much too.
(I may be wrong on the above statement and the following statement I am about to say too.)
The diameter of the factory loaded brass is .462 the diameter of the spent casing is .468. Obviously there should be some size difference since the spent brass isn’t sized but anyways I’ll continue… I’m still a newbie to this sort of stuff.
I’ve already took the 6mm Rem spent cases and they chamber in the Mystery Mauser fine. The factory ammo I have chambers fine and I took the reloaded round to the Mystery Mauser and it chambers fine. This chambering must be pretty open for a round with a COL of 2.935” to chamber easily.
I’m in the 90-100% certain range that this Mauser is chambered in 6mm Rem. It appears the reloads are not for the Remington 700 though which really surprises me.
This is my assumption without casting the chamber. Thoughts?
