6.5 x 55 full loads

As you may gather, the CIP is the most advanced organization controlling specifications, including pressure.

PTmax = maximum average pressure (bar)
PK = 1,15 Pmax = maximum statistical individual pressure (bar)
PE = 1,25 Pmax = mean proof pressure (bar)
M = location of the pressure take (mm)
EE = proof kinetic energy (Joule)
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peterdobson said:
Specs that Lapua comlies with, perhaps an engineer wl convertto Imperial.
Pressures (Energies)
Method Transducer
Pmax = 3800 bar
PK = 4370 bar
PE = 4750 bar
M = 17.50
EE = 1505 Joule
Click to expand...

Pmax = 3800 bar = 55,114psi
PK = 4370 bar = 63,381 psi
PE = 4750 bar = 68,892 psi
M = 17.50 ?? what Units??
EE = 1505 Joule = 1,110 ft lbs
 
So I ask for an engineer and what do I get, a cardiologist! At least the good Doctor has an MSc and is a very technical shooter.

Thanks Mark,

Peter
 
Thanks Ryan500. And everyone else. This is getting to the root of it. I realize that trying to load higher than one should is like playing Russian Roulette, maybe worse. And believe me that is not a goal I'm after. I'm just trying to get a bit of a handle on all the experience that 100+ years of shooting these rifles has accumulated. I know the starting point. I'm just trying to find the "official" max load point to stay back of. There is an absolute wealth of experience and information here and at times it can become easy to just ask instead of search on the web. But it's way quicker that way too. Thanks.
 
4150 bar = 60,175 psi which seems around where the 308 loads max out in the Lee book. Does Lapua operate to the CIP standard or in other words load their 6.5 to a pressure ok for the 96 Swede? Because their Pmax is about 5,000 psi higher than max pressures in the Lee book.
I also notice that there are a couple of loads where te pressure is give in "CIP":
VEC SP9 powder, 40.1 grains, Velocity of 3117 with an 85 grain jacketed bullet.
VEC SP7 powder, 36.3 grains, Velocity of 2592 with a 120 grain jacketed bullet.

The CIP value (whatever it is) is less than either CUP or PSI values. Studying the book shows some anomolies for each bullet size where there is a powder that produces a similar velocity load while producing significantly less pressure.
 
snomad said:
As with these older calibers there are many rifles out there that are considered not safe to load to the full potential of the cartridge. That being the reason for sedate factory loadings in these calibers. My question is what is considered an older or non-modern action? Specifically the Swede 96 and 38 rifles and derivitives. Are these actions adequate. Are they proofed to full modern loads or not? What PSI or CUP. The Lee book gives maximums for this cartridge around 51,000 PSI and about 45,000 cup. Can those two actions be loaded to that potential safely? Thanks.
Click to expand...
What powder(s) do you have on hand to reload your 6.5X55/96 with and which bullet will you be loading?
Also is the LEE manual the only manual that you have?
 
At this time it is the only manual. Other loading data that I got from the Hodgdon site duplicated the Lee data. I have been reloading for two calibers, .260 and .243 and also 30-06 recently. Powders on hand are H4831 and H4831sc, Varget, H4895. I also had used some IMR4320 for the .243 as well. I had no problem working up loads for these calibers from that one source with a chrono and carefully checking for pressure signs. This caliber presents a little different problem in a 96 action. I would like to reload a light bullet -- 120 grain or so. They work well in the .260, hopefully will in the 96 barrel too. Interlocks, SST's, something along those lines mostly just range but perhaps a back-up for deer.
 
The Hodgdon site is a good one and I used their reloading data when I use to load for my 96... Now I have newer or modern actioned 6.5X55 and I use 6.5X57 data from an old Speer manual...
While I have complete confidence in the Hodgdon 6.5X55 online data myself you may want to give them a call to ease any fears that you may have about using their data in your 96..
They have helped me with data questions in the past..

BTW if you check TradeEX they sell 96/38 that have been rebarreled to 30-06's by the Swedes..
Good luck with your 6.5
:)
 
Interesting point. The pressure developed by a 30-06 pushes 60,000 PSI......
I will get in touch with both Hodgdon and Lee next week for their input. Interestingly enough I was looking at the difference between that 96 and a newer Husky sporter I have that was rebarreled from a 308 to a 30-06 just last night. Thanks.
 
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