I bought 2 boxes of Hornady Outfitter 300 Win Mag 180 GMX to shoot in my new to me Blaser.
It shot 1/2 moa to 400 yds (as far as I've tested it) and the cases came out "snickety - snick"
Unfired ammo has a rounded face primer like a Winchester. After firing, the primer is flat against the bolt face. Too hot, nope as cases fall out, head expansion is a non event and the Blaser has nowhere near the primary extraction power of a Mauser.
And the nickel cases are soooo pretty !
This is false. I run the A191 chambers, they have SHORTER throats than SAAMI chambers, therefore a SAAMI chamber produces LESS pressure.Not wise to shoot MK248 mod 1 ammo in guns not chambered for it. Its loaded for 68k psi in their chamber. You probably hit 75-80k.
What a great question. By the way no; I have no clue but hopeful that someone will chime it with the magic bulletSo we've all seen it advised a bazillion times; "....work up a load slowly in your gun, watching for pressure signs". And, "If you change any component, start over on load workup with a reduced charge".
Now sometimes it is difficult when reloading to match the performance, at least in terms of velocity, of factory loaded ammo. To be competitive, and keep the buying public happy, (and brand loyal), factory ammo has to have relatively high velocity performance for each given cartridge.
So how do they do it? How do they make rounds with respectable velocity, that are safe in "any gun of modern manufacture in good condition"??
I realize they use powders that we don't have access to, but where's the "magic"? High performance loads, that work in ANY gun, (and are safe) ,with no gun specific load workup.
What am I missing here??
This answers a question I've had for some time: why does Hornady factory ammo for a given caliber and bullet weight exceed the maximum MV published for the same combination published in their reloading manual?This is false. I run the A191 chambers, they have SHORTER throats than SAAMI chambers, therefore a SAAMI chamber produces LESS pressure.
To the OP, the reason the factories produce loads that work in almost every gun is because they use a few techniques that are known to produce high start pressures with a fast powder that produces a flatter curve.
They blend several powders to get a pressure within 10,000psi of max at the VELOCITY they determine to be optimum.
The biggest trick they use is crimping, this raises the start pressure significantly and flattens the curve somewhat. The rise over time is short, because the powder used is on the fast side.
I compared Winchester loaded ammo in 300WM loaded with 785, Winchester’s equivalent to 780, and my own 780 loads.
I could not come close, without excessive pressure, to their velocities. Over my pressure trace, my loads were over 75,000psi, proof loads actually, to match their velocity.
So their tricks in formulation, crimping and blending is what makes their loads safe.
The maximum pressure from any load in that factory ammo was only around 56,000psi, now I know my pressure trace isn’t calibrated to SAAMI reference ammo, but that is quite low for the 300.
I've saw plenty of factory rounds with ejector marks as well.I have more than once seen ejector marks on factory loaded brass. I would assume that factory rifle makers are mandated to stay within a set dimension for SAMMI and if the cutters go outside of that, they are changed out. With that they can take their "high performance" load at either end and if no signs of pressure are noted, there good to go. Now do rifle manufactures hold true to that limit?? I dont know, seeing ejector marks on factory loaded ammo leads me to believe, no.
Maybe Im WAY off, if so I too have always wondered that.