In my particular gun, 48.5 grains of H4350 with a CCI200 primer gives me 3000 fps and 56.5 KPSI peak, give or take. Your individual results will vary. The old small ring actions are good for less pressure than this.

Partitions are hard to engrave, and will boost peak PSI some.

ShooterBob, Your pressure estimate agrees pretty well with my SWAG(sciwildasguess) in a similar load. 140 SierraGameKings w/ 46.0gr of H4350 gives vels around 2890fps in my mil M-96.

Maybe, one day I'll be able to give/get a real strain reading.
Is the Swede 96 an old action? Yes
Should the 96 be a hot rod action? Probably not
Is the 96 action strong? Yes, very
Husq made 96's in civilian production calibers including the 270 Win. They don't seem to worry too much about its gas handling abilities, not to say the 98 mauser's gas system isn't better.
IIRC, The opening poster asked if 2700fps was attainable safely in a 22" barrel. I say, yes.

I'm using a CZ 550, so I'd imagine I'm ok with the elevated pressures.

quote:

I'm using a CZ 550, so I'd imagine I'm ok with the elevated pressures.

Without a doubt.

quote:

Husq made 96's in civilian production calibers including the 270 Win.

I am completely unburdened by any actual knowledge, but have been told that the Husqvarna 270 and such are actually not M96 actions, but a more modern action that looked like a small ring. FWIW.

My old M96 gives me 2800 fps out of its 29" barrel, with 50 KPSI book loads and 140 grain bullets. With old eyes, and iron sights, it will do sub-2" five-shot groups all day long. It shoots all loads very well. That gun just seems intent on finding ways to please me. If I had to get rid of all my rifles, I think that one would be the last. One of the best $150 investments I ever made.

quote:

Originally posted by denton:
I am completely unburdened by any actual knowledge...

After reading post after post of invalid statistical data from a non-calibrated HSGS (as if it had any actual value), and of course The World's Most Ignorant Reloading Suggestion(hammering on a live seated primer with a sharp tool to remove it), I never really expected a post from him I could agree with.

But,... I'm in complete agreement with the above quote!

Hot Core:

Childish, irrelevant, and incorrect, as usual.

Lonniemike, the figures you posted give me a bit of confidence in my guestimates, anyway I loaded some trial rounds this weekend so I'll be able to find out soon. What game do you use your 140's on?

Re. the Husquvarna .270, the earliest .270 they made was the 1950 model built on a FN sourced action, then in 1955 they introduced their own modified small ring action.

After my praise for my .243 previously I had a small deer run on into the woods (not far) before dropping this weekend, compare with two weekends ago, similar range, same load, same shot placement, deer knocked clean over.

ShooterBob

To date this load has seen zero deer, one boar that ran like a sprinter out of the starting blocks for 40-50ft, and some paper. Best-o-Luck

Thanks for the info so far. I'm learning a lot, thats what that burning smell is. Stupid question but............. most of you 6.5 fans and owners seem to be in the east coast or south or Norway & Sweden. Is there anyone here from the west that has some good mule deer, bear and elk recipies that you have had good success with ? Thanks again.

In a cz 550 what speeds could one get from the 100 gr bullets when pushed at there hardest ??

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In a cz 550 what speeds could one get from the 100 gr bullets when pushed at there hardest ??

3100 fps

Unless your barrel is particularly "fast" or long, more than 24", that is the ceiling. And even av "fast" and long barrel will not give more than another 50fps within safe limits.

Tron

TRB,

what other rounds could a 6.5x55 cz 550 be re-chambered to seeing as its a 30/06 length action ??

How much more speed with the 6.5/06 would one get with the 100 gr weight bullets over the plain old 6.5x55 ??

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In a cz 550 what speeds could one get from the 100 gr bullets when pushed at there hardest ??

Since I can get 3075 for a 120 grain bullet, at pressures that do not exceed the 30-06, I think that 3200 fps might be safely achieved with a 100 grain bullet. I have not run that test.

There is no such thing as a barrel that can get faster speeds at lower pressures. When you specify pressure as a function of time, friction, bullet mass, engraving force, neck tension, bullet base area, and barrel length, you have completely specified muzzle speed.

The 6.5-06 is less efficient than the 6.5x55. The additional powder does not give a large increase in muzzle speed. If you compare modern pressure data for the 6.5x55 with the 25-06, for 100 and for 120 grain bullets, they are very close to equal.

quote:

In a cz 550 what speeds could one get from the 100 gr bullets when pushed at there hardest ??

My chronograph is in transit now.
I have every intention of working up loads in my CZ from 100 to 160 grains.
So I may have an answer for you sooner than later.

When you achieve "book" bullet speeds, you've probably also achieved "book" pressure.

When working with rounds that are under-loaded, you don't have the benefit of knowing what speed corresponds with the maximum safe pressure.

Usual pressure signs don't usually show up until about 70 KPSI.

Ohhh... you already know all that. Just watching your six. Let us know how it turns out.

[Thanks for the help thus far folks, going into a gun decision mode one might say !!

quote:

what other rounds could a 6.5x55 cz 550 be re-chambered to seeing as its a 30/06 length action ??

None, I´m afraid, the base diameter is larger than the .30-06 family of cases. Of course you can rechamber to a 264. WM... But why would you want another calibre? The 6,5x55 is in my opinion the ultimate 6,5mm, accurate and fast enough without pushing it beyond what the cases can withstand. I get 15 or more reloadings out of my cases with reloads fast enough to handle deer out to ca. 200 meters.

Tron

Yeah your right TRB and the .264 has a prepensity to push the truth with published speeds is that correct ??

How much velocity is enough with the Hornady 129 gr Spire Point bullet? And how much velocity are you willing to trade off for accuracy? My Howa 1500 has a 22" barrel, but seems to run "slow", (either that or my Chronograph is overly pessimistic, but I don't think so, since my .270WSM handloads are clocking right where other loading data says they should be). My most accurate loads have been with the 129 gr Hornady bullet and IMR-4350, but 42.5 gr of powder only pushes the bullets at 2450 fps 6 feet from the muzzle. I have tried up to 46 gr of the IMR-4350 and its' velocity is better (around 2650 or so) but the groups are 50% larger. I would prefer to shoot the loads that average .80 of an inch for 3 shots off the bench, but I wonder if that extra 200 fps velocity would make it a better more reliable deer cartridge. IMR-4064 also seems to be pretty accurate, better than MOA, but again, the velocity seems a little lower than it should be. Any suggestions? Please don't suggest Reloder 19 powder for the 6.5x55. My Howa seems to hate that particlar powder. It has performed reasonably well with IMR-4064, IMR-4305, Vihta Vuori N-165 and Reloder 22. The Reloder 22 works fine with the heavier 140 gr slugs in the 6.5x55. Curious what all your takes are when the choice is 2400 fps with a 3/4" group vs. a load that averages over 2600 fps and groups around an inch and a half.