Wondering if any on this board have chronographed this load. Winchester says the Failsafes does around 2700 fps but I chronographed these loads out of my Sako 24 inch barrel & a friend's Ruger Magnum 23 inch barrel and they are way lower.

In my Sako they average 2480fps, in the Ruger 2442 fps. Is my chrony reading low or are the factory figures off a test barrel or something. Does not really say on the Winchester Ammo web site.

For reference my handload which is 1 gn above max in the Speer No 13 manual gives 2578 fps in the Sako & 2540 fps in the Ruger. This load is 83.0gn W760 with 270gn Woodleigh PP, Win Brass & WLR primers.NB. This is above Max so Caution but in my rifle no pressure signs at all.

One thing about the Win Supreme Ammo the velocity spread is only about 18-22 fps whereas my load even with weighing each charge is 47-53 fps. Damned consistent that factory stuff & hard to beat.

Any of you guys out there with a Oehler 35P it would be great if you could test out if the published figures are true.

Thanks,
JohnT

John,

I only had one box of the Failsafe 270 grain and never chronographed it.

But your velocities do sound low. I have chronographed off and on over 30 years the older 270 grain Power Point ammo and that was always around 2620 to 2640 from Model 70 24 inch barrels.

Your 760 loads sound a bit low but are in the right area.

Mike

I has been a while since I chrographed any FS 375's, but I never remember them not being anything but "fast".

They sure on heck on Brown Bear.

Mike,

Do you mean my 760 loads are a bit low on the powder charge or on the velocity side?

Regards,
JohnT

John,

A bit low on velocity but not to far out. Sometimes you get this with ball powders.

The only 375 I have seen in the 2400s with Winchester 270 Power Points was a Ruger Express and we put that down to the very weak firing pin that often comes with Rugers. That was an early Ruger Express, when they first came out. Other loads were not chronographed in it, but the same ammo clocked 2600 plus in a Model 70.

Mike

Mike,

If I want to work up to Maximum is it safe in a H&H size case to go up 1 gn at a time or do I go 1/2 gn?

Interesting you mention about the Ruger Express because one of the rifles used was one of these, the early Ruger's with the barrel band going thru the wood, but then my Sako registers same velocities.

Then again it could very well be the chronograph's clock is off. I've got one of those CED Millenium chronos & function wise they are great but need to calibrate it to be sure. Know of anyone with a Oehler 35P?

Regards,
JohnT

John,

I have the Oehler here. Every bad reading I have seen with Chronys was reading high. I suspect that is occuring in America as well because in my opinion the velocities given on these forums seems on the high side.

An extra grain at a time will be no problem. More often than not calibers like 375, that is small case capacity for the bore, usually lose accuracy before you get to hot a load.

Mike

Holmes,

At the range I go to there are plenty of chronies there and I have had 2 of them.

The very first ones that were a green color seem to have real problems.

As near as I can tell it varies with the light and how it triggers the screens.

These days I do very little cronographing but when I used to set up the Oehler a someone with a Chrony would often come down and ask if he could check a load. In most instances they agree with the Oehler but when out they have always been high. But then again, I guess if it was how the screens were triggered they could just as easily read low. Say the tip of the bullet triggered the 1st screen and the base triggered the 2nd screen you would geta low reading.

When I first tried a Chrony at the range it read 3360 for some 130 grain 270 loads. Yet the very same Chrony when used by father and a friend of his on a private property gave correct readings and we cross checked it a couple of times.

By the way to show how things have changed, my first chonograph was the Oehler 10 which I got about 1970 at the rioe old age of 22. Back then we had to use paper screens with a printed circuit. I still remember my first two first loads chronographed. A 308 Normas necked 257 with 74 graisn of the old 4831 and 87 hornadies at 3880 f/s and of course, 270 grain 375 factory load which was 2610 f/s.

Mike

Mike,

Let me know when you are next heading out to Silverdale & I will meet you there.

There are a few things that I can check out on the CED until then.

I also have a Ruger 77 MK1 25-06 at a gunsmith friend of Kevin's near there. I have to it pick up & shoot. Bloody thing won't shoot decent groups that's why its there.

Regards,
John

John,

Here is a better idea. It needs a new el cheapo tripod. Lets get that organised and then you can take the Oehler away and play with it yourself.

We have not used it for about 3 years. A very good mate of mine has settled on 264 Winchester, in fact I have just being talking to Ross Waghorn for him about $2000 blank, the rifle shoots ragged holes, but he is too scared to chronograph the loads and that is deadset true. Sometimes ignorance is bliss, or alternatively have a 375 or 458 and velocity does not matter.

I love the relaxation factor of my round noses and flat points

By the way, the bloke with the 264 owns the Oehler but it resides here.

Email me and we will set you on your merry way.

I may get to see some new load developments in 375

Mike

Factory ammo has a habit of slowing down after its initial push on the market, saves law suits, but a 270 gr. Failsafe at that near 2500 FPS is deadly on buff and stuff and not prone to deflect as a faster bullet might do...