Hey everyone just preordered a Weatherby MK5 in the new 6.5 RPM. I’ve already acquired the dies and some loaded ammo to get my brass from. But published data is quite low, lots of ballistic data and data on case specs etc... but I can’t seem to locate any good data on loads; anybody have any recommendations on how to build a load with no published information or where to find reputable info?
6.5 RPM reloading data
- Thread starter ChiefG
- Start date
The 2021 annual Hodgdon reloading manual ( magazine ) has an article on the rifle and cartridge and some loads that were worked up by the author.
More precise info is included in the rifle data section of the manual that includes numerous bullets,powders and starting and max loads using all the applicable powders in the Hodgdon family.
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They keep reinventing the "obsolete" 264 Win Mag.
Hodgdon has load data.
Case capacity is 82.5 grs which is practically identical to the 264 Win Mag, yet Hodgdon continues to publish very mild load data for the 264 Win Mag, while the 6.5 RPM is where most people have been loading their 264 Win Mag for years.
Hodgdon has load data.
Case capacity is 82.5 grs which is practically identical to the 264 Win Mag, yet Hodgdon continues to publish very mild load data for the 264 Win Mag, while the 6.5 RPM is where most people have been loading their 264 Win Mag for years.
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264wm won't fit in a 6 lug Weatherby Mark V action
So if you must have a Wby Mark V "Standard" and want 264 Win Mag performance, you must use the 6.5 RPM - the 264 Win Mag belt won't fit? This from the company that invented the "Belted Magnum" (by copying the 375 H&H).
Seems Wby has been watching what Apple does with their phones.
Like with the 284 Win, I suspect a lot more 6.5 RPM brass will be sold for Wildcats than for use as 6.5 RPM.
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I agree that the 264 Win Mag is essentially a commercial dead end, and it's true on the ammo front!
I have a real affinity for the 6.5mm bore and presently shoot the 6.5X55, 6.5-06 and a 6.5-300 Win Mag. Most barrels have twist rates of 1:9 or faster which enables the use of high BC bullets which is a plus.
"Back in the Day" when the 264 Win Mag was introduced (1959) I think it was challenged by the notion that it was a "barrel burner", had lots of reocil and muzzle blast, and the fact that it was only slightly faster than the 270 Remington. It was probably doomed with the introduction of the slightly larger 7mm Rem Mag in 1962, which does practically all it can do and do it better in many opinions. This all remains true, however there are now many more bullet choices for the 6.5mm bore, many more powders available, and many more shooters who can afford more than one or two rifles, so the 6.5mm bore is among the most popular today.
