Ok Chaps - it looks like I am about to cave into my 20 year old 300 Weatherby Mag fantasy and make the purchase....
As always with relatively esoteric calibres (well in these parts anyway) there seems to be a wide range of views (often based on no real knowledge). Couple of the negatives folks have thrown at me are as follows:
- Very inaccurate.....
- Inefficient cartridge with regards to powder required for velocity...
Just wanted to get the thoughts/comments of anyone with actual experience of the calibre can help either confirm or dispel these myths/facts and perhaps provide some reloading data around what works for you?
BTW - it will be used for deer and some range work.....
I have owned several Winchester and Remington rifles (and seen several others) in .300 Weatherby. Presently have one .300 Weatherby/Rem. 700 with factory (custom shop?) fiberglass/kevlar stock, the others have moved on to other owners.
The only reason I still have this one is that I want to use the action and stock for something that will shoot better than the 1.5 inch/100 yard groups that I have been able to get with it so far.
Now, my Remington and Winchester rifles in .300 Win. Mag and .300 Rem Ultra always shoot less than MOA if I hold properly.
I was able to acquire two Win. 70s in .300 Ultra before the Conn. factory turned out the lights---wanted to use the actions for "something" but decided to shoot one of them just for grins.
I bedded the tupperware stock with Steelbed just to be able to say I have tried it. Well, the crazy thing shoots about 1/2 inch groups as 100 yds. Kicks about like you would expect, but I can accept that for the results I'm getting.
Anyway, now I don't want to change anything-----at least until the plastic stock/bedding gives up.
As for the .300 Weatherby, I'm finished with it in the standard chamber configuration.........there WILL be others with different experience, but this is what I have experienced.
The .300 Wby has been used for 1000 yard competition in custom built rifles, but I'm doubtful that the standard reamer (freebore) was used.
If a different reamer (no freebore) is used, I would not shoot factory (or factory equivalent) ammo in it.
Thanks Jim - sounds fairly consistent with what I heard from other folks....
Trouble is I'm smitten.....so may be a case of making the best of it! I will be reloading (as I would need a mortgage for factory ammo) so will be able to optimize my load....in any case sounds like I need to 'manage' my own expectations...
My current field rifle is a custom 300 weatherby built on a remington 700 action and I love this round and rifle. It keeps sub 1/2 moa all day long (and sub 1/4 when I am really on my game). I have effectively shot the rifle out to over 1200 yards and have no issue going further.
There are two schools of thought on this. I'll start with mine:
With the 300 wby you can get 3100 fps out of a 200 grain bullet, though you might have to load longer the max magazine length. And I can consistantly get 1/2 moa accuracy out of my rifle. I also love the brass selection. Other then the Win mag I know of no other 30 cal magnum that has better brass selection. Ultimately I would not consider myself under-gunned while taking any game in North America with this round, and it is capable of taking most african plains game.
The other train of though:
Some don't like the double radius neck on the weatherby and simply refer to it as "silly". They also contend that they can get better MV out of the RUM, which you can, but at the expense of significantly more powder. They also contend that other rounds are more accurate (I have not found this to be true) and easier to handload. Which I agree with the handloading part, belted magnums are bit more work when loading them.
In the end it is personal decision of what round you like or don't. But if it were me I'd keep this round, it is a really nice round.
I don't have a lot of experience with the 300 Wtby, so I should maybe keep my mouth shut. But I am currently trying to work up a load in a client/friend's rifle, a Weatherby Mark V.
First problem is that the magazine is very short for the amount of throat in the chamber. In order to fit the magazine the bullet has to be loaded .275" back from the lands. Weatherby does this on purpose to use the long throat as part of the combustion chamber and enable them to put more slow burning powder in their factory ammo. But what this does to reloaders is greatly reduce velocity.
I started out with a medium load of RL19 and RL22 with the 180 gr TTSX and the 180 Accubond
TTSX - RL19 - 77 gr - 2906 fps
TTSX - RL22 - 78 gr - 2858 fps
AB - RL19 - 77 gr - 2899 fps
AB - RL22 - 78 gr - 2851 fps
So this told me that the rifle does not get much velocity so I did a 1 shot per load Audette ladder with the TTSX going up in .3 gr increments
TTSX - RL22 - 78.0 gr to 80.1 gr (0.1 gr over book max) - 2824 fps to 2923 fps
TTSX - RL25 - 79.7 gr to 81.5 gr - 2807 fps to 2806 fps
now the velocity is still way low even though Nosler #5 manual say 80.0 gr RL22 is max and gets 3132 fps. WTF
So next I have continued the ladder up in RL25 (which showed the best results on the target and is more available than RL22) and found some IMR7828 to try this ladder next
TTSX - RL25 - 81.8 gr to 84.5 gr
TTSX - IMR7828 - 83.3 gr to 86.0 gr
Book max for the IMR7828 is 84.5 gr and shows 3185 fps. I will shoot the IMR7828 loads and look for pressure signs on each case as it steps up.
Now what I am trying to say is that this is a lot of useless shooting in order to get velocities even up to 300 win mag standards. Frustrating as hell and I don't like to go over book max, especially in someone else's gun.
Like Longshot said, the brass is excellent, very consistant neck thickness. But I will never buy a 300 Wtby myself.
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