Best Group of the day from my K31
- Thread starter jeanlikethis
- Start date
- Location
- chilliwack BC.
possible. I don't know what type of powder or how much of it is in GP11, but it definitely hits hard for a non magnum heavy hitter.
- Location
- chilliwack BC.
HOLY!!
I knew it was a 174grn, but wow.
Anything comparable in other powders? I have 4064, 3031, 4895, 4350 and Ram Tac.
I knew it was a 174grn, but wow.
Anything comparable in other powders? I have 4064, 3031, 4895, 4350 and Ram Tac.
7.5x55 Swiss
Wt. Bullet Powder Manufacturer Powder Charge Velocity (FPS)
175 Berger IMR IMR-4350 47.9 2483
Remarks:#max load
175 Berger Hodgdon H-4350 48.1 2487
Remarks:#max load
175 Berger Winchester W-760 49 2560
Remarks:#max load
175 Berger Norma N-204 49.9 2516
Remarks:#max load
175 Berger Alliant RL-19 51 2533
Remarks:#max load
175 Berger Vihtavuori VV-N160 51.4 2467
Remarks:#max load
150 Sierra IMR IMR-3031 45 2,820
Remarks:#pressure 44,000
180 Hornady IMR IMR-4064 45 2,570
Remarks:#pressure 44,000
http://theswissriflesdotcommessageboard.yuku.com/topic/9041/75x55-Load-Tables#.VxMmnzArLIU
Wt. Bullet Powder Manufacturer Powder Charge Velocity (FPS)
175 Berger IMR IMR-4350 47.9 2483
Remarks:#max load
175 Berger Hodgdon H-4350 48.1 2487
Remarks:#max load
175 Berger Winchester W-760 49 2560
Remarks:#max load
175 Berger Norma N-204 49.9 2516
Remarks:#max load
175 Berger Alliant RL-19 51 2533
Remarks:#max load
175 Berger Vihtavuori VV-N160 51.4 2467
Remarks:#max load
150 Sierra IMR IMR-3031 45 2,820
Remarks:#pressure 44,000
180 Hornady IMR IMR-4064 45 2,570
Remarks:#pressure 44,000
http://theswissriflesdotcommessageboard.yuku.com/topic/9041/75x55-Load-Tables#.VxMmnzArLIU
For Ram Tac, uses .308Win loads as a guide. min. 39.1grs. gives 2480fps: max 43.4grs gives 2690 FPS. in the .308Win with 175gr bullet.
http://www.ramshot.com/wp-content/uploads/2010/09/WesternLoadGuide1-2016_Web.pdf
Capacity of 7.5x55 is closer to 30-06, but no need to push the pressure up as far.
.308Win loads will keep it in the GP11 pressure zone with the GP11 size case.
Ramshot tac 30-06 with 175gr bullet:
Min 40.1 for 2,457fps, Max 44.6 for 2,634fps.
Alliant list 48.7grs of RL-17 with 180gr bullet in .308Win at 2641fps.
Max loads in 7.5x55 CAN be higher than max .308 loads with with lower pressure.
I use 50grs RL-17 myself.
Use due diligence.
http://www.ramshot.com/wp-content/uploads/2010/09/WesternLoadGuide1-2016_Web.pdf
Capacity of 7.5x55 is closer to 30-06, but no need to push the pressure up as far.
.308Win loads will keep it in the GP11 pressure zone with the GP11 size case.
Ramshot tac 30-06 with 175gr bullet:
Min 40.1 for 2,457fps, Max 44.6 for 2,634fps.
Alliant list 48.7grs of RL-17 with 180gr bullet in .308Win at 2641fps.
Max loads in 7.5x55 CAN be higher than max .308 loads with with lower pressure.
I use 50grs RL-17 myself.
Use due diligence.
Last edited:
- Location
- chilliwack BC.
awesome, thanks.
I am shooting only out to 200m, and mostly at half that, so I go with less pressure. Its easier on the old girl and the old shoulder too.
I want to try it with some cheap 150grn bulk fmj bullets, but I fear that they won't be long enough to be that accurate? I guess for shooting steel at 50m it would be fine tho, and they are much cheaper.
I am shooting only out to 200m, and mostly at half that, so I go with less pressure. Its easier on the old girl and the old shoulder too.
I want to try it with some cheap 150grn bulk fmj bullets, but I fear that they won't be long enough to be that accurate? I guess for shooting steel at 50m it would be fine tho, and they are much cheaper.
- Location
- chilliwack BC.
just for plinking, for taking new people out, slapping steel plates at 50m, that kind of thing.
Used a punch I shape on drill press w/ Emory cloth to the right size for a seal on the case mouth and filled case with water , put in press and punched out through die hole
I have the right berdain primer so once I touched up the primer hole with a tool . Found a recipe and went shooting
I have the right berdain primer so once I touched up the primer hole with a tool . Found a recipe and went shooting
Hard to understand without a pic.. Can you post one of your gear?
I know the GP11 primer is crimped, is it easy to decap it?
I got the idea off you tube . Several ways to hydraulic primer out , then found a tool that would de- bur the crimp
Picture the case full of water and my punch sealing the case mouth but fitting and driving primer out ,I had to take the punch down slowly on the drill press sanding UNTILL it was just the right size . It takes a lot of time but I like using the gp11 brass , I got the right primer from a CGN member
Picture the case full of water and my punch sealing the case mouth but fitting and driving primer out ,I had to take the punch down slowly on the drill press sanding UNTILL it was just the right size . It takes a lot of time but I like using the gp11 brass , I got the right primer from a CGN member
A lee .30 cal hand decapping punch and #3 shellholder works perfect for hydraulic decapping. It doesn't even make much of a mess. Then the lee chamfer tool with a little hole drilled to allow the anvil in the case to remove the crimp, some berdan primers from Henry and you're off to the races.
How your punch seals the case mouth? is that possible? Please, show a pic. I am thinking turning the GP11 into boxer but if there is a press mount decap possible, might be good to keep the original Berdan structure.
