Originally Posted by Moby1
Originally Posted by Mule Deer
In fact, handloaders can safely exceed the muzzle velocity of Hornady Light Magnum 7x57 ammo with "modern" pressures of 60,000 psi or so, even in a 22" barrel. Look it up in Nosler's manual. The top muzzle velocity listed for 140-grain bullets in the 7x57 is 2892 fps. With the 139 Hornady (which has a shorter bearing surface than any 140-grain Nosler 7mm bullet) you can safely go up to 2950 or so.




According to the above paragraph from Mule Deer (who I have great respect for) by handloading a 7x57 you might achieve a MV of 2950, or 120 fps faster than a Hornady LM 7x57. What I don't understand is why the 7mm-08 is considered lessor than the 7x57 by people on this forum, when the Hornady LM in 7mm-08 is already at 3000fps, only 110fps slower than a .280.

I'm just curious, I really have no axe to grind either way, as I shoot a .308 and at the MV's we're talking about, I'm sure a deer would never know the difference.

Patrick

.280 Remington posted before me and answered my question.


Loaded to like pressures...the 7-08 is "lesser" than the 7x57.

My father had loaded for my brother's Ruger 77 7x57 for years...and was running right at 3000fps with 139 Hornadys in a 22" bbl. Never a moments worry from it either.

As to Hornady's light mag ammo...I don't know about the 7x57, but their .280 ammo is the real deal! The only box I ever bought ran the moly'd 139s at 3200fps (Three Two Zero Zero) in my 24" gun, and yeah, I checked the chrony with 2 other known loads that same day. And yeah, Hornady claims that still running at SAAMI 60K psi not 65Kpsi. As well, Nosler claims its .280 data with 57grs of R-19 at 3150fps in a 26" tube is at 60K psi.

War Damn Eagle!