Anyone reload this? I have some brass and I purchased some 150gr Hornady .308 bullets and I have large rifle primers. Not much load data out there but I did find some on Hodgdon. From what I have read, using the .308 is fine because idk of a town that sells 7.5x55 bullets. I also read that u can use .308 data if need be. If anyone reloads this round, any insight would be appreciated. Also, these will be fired from a 1911 k11, not the k31.
7.5x55 Swiss
- Thread starter jojo4711
- Start date
sevt_chevelle
New member
I also shoot this round and have plans to reload it as well, just haven't yet.
Both the Hornady 9th edition and Sierra 5th edition manuals have info on the 7.5 Swiss.
And yes you can use .308 bullets.
Both the Hornady 9th edition and Sierra 5th edition manuals have info on the 7.5 Swiss.
And yes you can use .308 bullets.
7.5 x 55 bullets are .308". There's a bunch of data here, listed under .308.
http://stevespages.com/page8a.htm
Buckets on Reloader's Nest.
http://stevespages.com/page8a.htm
Buckets on Reloader's Nest.
I hand load for both k31 and k89/11. Two peculiar things. Those rifles seem to have short chambers and short throats. I need to lower the die quite a bit to resize, or I can't fully close the action. The bullet needs to be seated deeper, or it will bump into the riflings.
-TL
-TL
Dragonflydf
New member
I load 7.5 a lot, I used Hornady 150gr FMJBT over 39gr of IMR 4064. What I did to make sure I was seating bullets just short of the rifling was to take a full length sized case, and using a dremel with a cut off wheel, cut a slit down the side from the mouth to the shoulder. Seat a bullet in the case and put it in the rifle and slam the bolt home, carefully eject the round and measure the over all length, now shorten it a few thousands and use that as your over all length.
As far as getting mags, good luck, you would be better off getting the cardboard loaders, they work very well. I tried using the mag from my K-11 in my 1911 but it did not fit very well and I found I could reload faster with the chargers.
As far as getting mags, good luck, you would be better off getting the cardboard loaders, they work very well. I tried using the mag from my K-11 in my 1911 but it did not fit very well and I found I could reload faster with the chargers.
This is load info from the Swiss gurus on Swiss Guns message boards. Again all disclaimers apply. Proceed at your own risk, not my load data etc, etc.
Being nearly a dead match for the GP11 projectile, we use Berger 175 VLD's exclusively. Identical seat depths put the ogive right at the lands where it belongs.
RE17 also seems to be a dead match for the original powder, and not strange since it comes from the same factory in Switzerland making that powder since 1911. The main difference would most likely (maybe) be the coagulents. Under a scope it looks the same, weighs out the same by 100 logs and even smells the same.
This is ABSOLUTELY NOT a recommendation of any kind for your own reloads or your rifle. This is what we did and how we did it before hBN and using ICP's exclusively.
The brass is and for the past 10 years has been the beefy Swiss RUAG National Match brass. Norma brass will not act the same. The cases are FLS sized on a Forster with the primers being seated on a Forster. If you know the Forster press, you'll understand why this was important to us. TTL is critical and is always done on a Wilson. Projectile seating is done with a Redding Micrometer die and repeatable neck tension is also critical. (For us)
The RE17 data was worked up from 46 grains and ended at 50.1gr with an un-treated barrel. This ended as an accuracy load for us. It may or may not for you. This is a relatively hot load!
The switch to ICP's meant an immediate drop in velocity so we worked back up to 52.1gr of RE17 to achieve the same velocity as with the untreated bores and non-ICPs. The barrels are all hBN slurry sealed now.
There is an inherent danger here if you have rifles with untreated bores in the same rack as rifles with treated bores, and that's exactly why every bore in any and all calibers and rifles in our armoury here are hBN slurry sealed. There's no chance of inadvertently using an ICP with a 52.1gr charge in a rifle with an untreated (read higher velocity) barrel.
As you approach the RE17 47.5gr charges you must chronograph those shots.
Use GP11 cartridges as a MV control base and chronograph them. If you're using a 175gr projectile you'll want to emulate the MV of the GP11 with your own reloads. From there, follow the groups as they open or tighten. They can close, open and close again up the scale. Consider 5 round groups as your minimum. Once you're satisfied with that, go to 10 round groups to make it prove itself.
Record/chrono every shot until you find that golden recipe for your particular rifle. You may end up with a completely different and lower charge that works for you.
Just for fun, break a GP11 cartridge and weigh the charge and projectile weight, then run a complete spec check on the case. It's informative and educational.
Good shooting and reload safely and logically. Record everything.
If you don't have a Chronograph, this will all be a roll of the dice, and not a very safe one.
Being nearly a dead match for the GP11 projectile, we use Berger 175 VLD's exclusively. Identical seat depths put the ogive right at the lands where it belongs.
RE17 also seems to be a dead match for the original powder, and not strange since it comes from the same factory in Switzerland making that powder since 1911. The main difference would most likely (maybe) be the coagulents. Under a scope it looks the same, weighs out the same by 100 logs and even smells the same.
This is ABSOLUTELY NOT a recommendation of any kind for your own reloads or your rifle. This is what we did and how we did it before hBN and using ICP's exclusively.
The brass is and for the past 10 years has been the beefy Swiss RUAG National Match brass. Norma brass will not act the same. The cases are FLS sized on a Forster with the primers being seated on a Forster. If you know the Forster press, you'll understand why this was important to us. TTL is critical and is always done on a Wilson. Projectile seating is done with a Redding Micrometer die and repeatable neck tension is also critical. (For us)
The RE17 data was worked up from 46 grains and ended at 50.1gr with an un-treated barrel. This ended as an accuracy load for us. It may or may not for you. This is a relatively hot load!
The switch to ICP's meant an immediate drop in velocity so we worked back up to 52.1gr of RE17 to achieve the same velocity as with the untreated bores and non-ICPs. The barrels are all hBN slurry sealed now.
There is an inherent danger here if you have rifles with untreated bores in the same rack as rifles with treated bores, and that's exactly why every bore in any and all calibers and rifles in our armoury here are hBN slurry sealed. There's no chance of inadvertently using an ICP with a 52.1gr charge in a rifle with an untreated (read higher velocity) barrel.
As you approach the RE17 47.5gr charges you must chronograph those shots.
Use GP11 cartridges as a MV control base and chronograph them. If you're using a 175gr projectile you'll want to emulate the MV of the GP11 with your own reloads. From there, follow the groups as they open or tighten. They can close, open and close again up the scale. Consider 5 round groups as your minimum. Once you're satisfied with that, go to 10 round groups to make it prove itself.
Record/chrono every shot until you find that golden recipe for your particular rifle. You may end up with a completely different and lower charge that works for you.
Just for fun, break a GP11 cartridge and weigh the charge and projectile weight, then run a complete spec check on the case. It's informative and educational.
Good shooting and reload safely and logically. Record everything.
If you don't have a Chronograph, this will all be a roll of the dice, and not a very safe one.
Very informative reply sir. I'll definitely keep that in mind and look into buying a chrono, been wanting one anyway.
All of this is a mute point of course until I can find a magazine. If anyone knows any places online that sells them or anything to load the rifle with, please let me know.
All of this is a mute point of course until I can find a magazine. If anyone knows any places online that sells them or anything to load the rifle with, please let me know.
Dragonflydf
New member
Here are the chargers for the 1911/K-11/K-31
https://www.libertytreecollectors.com/productcart/pc/viewPrd.asp?idproduct=3871&idcategory=18
https://www.libertytreecollectors.com/productcart/pc/viewPrd.asp?idproduct=3871&idcategory=18
Dragonflydf
New member
Trying to find a magazine for a 1911 is going to be a challenge, I would keep a eye on Gunbroker, ebay, Swissrifles.com, You might try emailing http://www.simpsonltd.com They seem to have the best selection.
And you are right, a K-31 mag will not work in a 1911, my K-11 mag barely work in my 1911.
And you are right, a K-31 mag will not work in a 1911, my K-11 mag barely work in my 1911.