Peregrine
04-07-2019, 12:42 PM
Hey all,
I accepted some free for the price of shipping 7.5x55 brass (x50) that someone was offering on a forum, they received it in a trade with a rifle and never actually did anything with it themselves.
Older PPU headstamp, generally it looks quite good but someone trimmed it way too much. Trim to length in the literature i've found is 2.185" or 2.175"
This stuff measures 2.094", I can only assume someone misread something and took off an extra .1", unless someone has a better explanation. Interestingly that someone did a pretty good job processing it at one point, the necks are nicely chamfered and the primer pockets are so clean you could eat off them, it was just just tarnished from age. I gave them a quick soak and a tumble and they they look quite nice.
I'm quite short of boxer primed brass for this caliber (only have 40), i'm curious as to what would happen if I were to use it. I'd imagine with the decreased neck area the pull force would be less and there'd be a significant difference in powder burn and the pressure curve compared to proper length brass. But what else would I be inviting here?
Here's a picture of two of them sitting on either side of a regular GP11 case, this is before I cleaned them. Ignore Dr.Peterson in the background.
They look a bit comical. :p
https://imgur.com/ekPgBNQ.jpg
I accepted some free for the price of shipping 7.5x55 brass (x50) that someone was offering on a forum, they received it in a trade with a rifle and never actually did anything with it themselves.
Older PPU headstamp, generally it looks quite good but someone trimmed it way too much. Trim to length in the literature i've found is 2.185" or 2.175"
This stuff measures 2.094", I can only assume someone misread something and took off an extra .1", unless someone has a better explanation. Interestingly that someone did a pretty good job processing it at one point, the necks are nicely chamfered and the primer pockets are so clean you could eat off them, it was just just tarnished from age. I gave them a quick soak and a tumble and they they look quite nice.
I'm quite short of boxer primed brass for this caliber (only have 40), i'm curious as to what would happen if I were to use it. I'd imagine with the decreased neck area the pull force would be less and there'd be a significant difference in powder burn and the pressure curve compared to proper length brass. But what else would I be inviting here?
Here's a picture of two of them sitting on either side of a regular GP11 case, this is before I cleaned them. Ignore Dr.Peterson in the background.
They look a bit comical. :p
https://imgur.com/ekPgBNQ.jpg