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Joined: Feb 2011
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I'll be posting a video soon, I've still got some rounds to fire form so maybe I'll blow somethin' up! Let's see ya'lls if you've got pictures, these guns are quite the eye candy.

Safariman, did you keep everything else original on your 257 Roy?

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The picture of the fired case looks like it is a 300AI. I have one in a 1950 rechambered rifle, also have the Ackley made dies.
On an interesting note I have 1963 rechambered 338 mag rifle that uses the 300H&H/300AI case but no dies, 338/300AI? No cartridge markings on the rifle.

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Tannergun, My 25ROY only has the action, trued and bluepronted, left from Winchester. Everything else is full on custom. My second full custom 257WBY. LOVE the round for deer and similar sized game.

Nathaniel, your 338 wildcat sounds a LOT like my own sort of original wildcat creation which is the 8mm RemMag necked up to 338. Probably not a nickels worth of difference between the two. My barrel is stamped 340 Tyrannosaur 'cause that is what I decided to call mine. Sort of a 340WBY improved. Pushes Barnes 225gr TTSXs out at 3100fps, which is right up there with 338 Lapua and 338RUM factory specs using a goodly dose of 7828ssc. I like mine better than those two rounds becasue I am getting there with only about 90 grs of powder and the rifle is built on a Magnum Mauser (OK Actulaly a hihgly modified 1917 Enfield, bout only the bolt body and reciever is left from the original manufacturer)

Would love to hear more about your 338 300AI!


LOVE God, LOVE your family, LOVE your country, LIKE guns and sports.

About 2016 team "R" candidates "We definitely need a crew with a sack of balls the size of hot water bottles, bloviated estrogen leaking feel-gooders need not apply." Gunner 500
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I still haven't seen another action I like better than the M70. The 3 position safety and CRF are gold. And the bolt is incredible, that's awesome that you kept it in your 257.

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If anybody ever has some extra H&H brass, I'd love to have it. Just lemme know a price.

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I have seen it for sale here in classifieds recently, you will need to check often andmove fast as many here grab up all they can get. You can also use 7mmSTW or 8mm RemMAg brass and just neck it to size. Don't buy too much of either until you are sure the case body fof the STW stuff is narrow enough or you might find yourself having to figure out a way to re-size the brass body a little but most likely it would work. Lots of that around and I saw some for sale recently here. Might want to go to the classifieds and look at the last week or so worth of ads or do a word search in that forum. You could also post a "want to buy" ad there. Midway often has it as does Blue Star Brass co (In Dallas Texas, of course) nearly always.


LOVE God, LOVE your family, LOVE your country, LIKE guns and sports.

About 2016 team "R" candidates "We definitely need a crew with a sack of balls the size of hot water bottles, bloviated estrogen leaking feel-gooders need not apply." Gunner 500
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Thanks again Safariman. I actually just got 50 brand new pieces of Hornady brass, but I can never have too much. Probably should just get that thing sighted in, and shoot the 243 Win when I feel the urge to shoot!

Do you suppose the 7mmSTW and 8mm Rem would still feed equally well? being necked out well and resized of course.

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They will feed just fine. Base, belt, etc are all the same. Length is close enough to not matter one to the other but all should be trimmed to a consistent lenght anyway. I have uses 7mmRemMg and 264 Win MAg brass to make 257WBY, 7mmRemMag to make 30 Belted Newton, lots of 300 H&H to make 300WBY back when the H&H stuff was lots more available and cheaper than the Roy stuff and I was younger and broker. Lots of fun interchanagle stuff out there when one knows what he is doing.

If you want to shoot that rifle a lot, even for varmints and practice you can load 40grs of AA5744 under whatever cheap bullet you have on hand from 125 grs on up and it will throw them out at about 2500fps with good accuracy and VERY low recoil.

Are you anywhere near Craig, Colorado? I used to love Elk hunting around that region.


LOVE God, LOVE your family, LOVE your country, LIKE guns and sports.

About 2016 team "R" candidates "We definitely need a crew with a sack of balls the size of hot water bottles, bloviated estrogen leaking feel-gooders need not apply." Gunner 500
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Dang, that sounds like a blast. I'll have to make a trip to Wyoming and see if I can't hit a few turf poodles.

I actually live about an hour away from Craig! Wapiti are still plentiful, but we don't hunt down there. How many times do you reckon I can reload the Hornady brass effectively?

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If you don't load 'em up too hot, 5 easily, maybe 10 or so but brass is cheap enough and plentiful enough that I rarely push the envelope that far anymore. You "need" Several hundred more pieces..... smile


LOVE God, LOVE your family, LOVE your country, LIKE guns and sports.

About 2016 team "R" candidates "We definitely need a crew with a sack of balls the size of hot water bottles, bloviated estrogen leaking feel-gooders need not apply." Gunner 500
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That's kinda what I expected. But, if I were to load them up to said 3200 fps, how many reloads could I expect?

I guess I probably should start collecting that brass! The Hornady stuff really isn't too expensive.

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Yep, start grabbing up brass. I don't re-use mine very many times anymore as I really REALLY hate the idea of a case head separation EVER, but especially in the middle of an elk hunt. Brass is cheap, eye's and opportunities at Elk not so much. With age and wisdom and perhaps a bit more money these days compared to 35 years ago I am no longer such a penny pinching scrounge at the expense of safety or loss of opportunities AND....as cool and excellent as pre 64 model 70's are, they are NOT so good at venting gases away from a shooter in the event of a case rupture. Not the place to be practicing a false economy.


LOVE God, LOVE your family, LOVE your country, LIKE guns and sports.

About 2016 team "R" candidates "We definitely need a crew with a sack of balls the size of hot water bottles, bloviated estrogen leaking feel-gooders need not apply." Gunner 500
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I do believe my eyes would be valued at more than $47.95, even with contacts in them! Safariman, being the officionado you are, do you have a preferred brass? As far as resiliency and what-not goes..

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I have a pre-64 300 H&H that I picked up for a song. I have restocked it and had it Cerakoted. I could give a damn about the value- I have a better rifle now. I am going to resist the urge to rechamber to 300 WBY for now.

Having put several thousand rounds through my 300 WBYs, let offer a couple of suggestions. 165-168 TSX or TTSX pushed by H4831 or H4831SC is all you need. It's fun to play with stuff but this has proven to be accurate and deadly in about 6 different 300 WBYs (effectively what you have). Never found a better powder for my WBYs (without freebore). That is why I suggest it. In a WBY with freebore, you might explore the slightly slower powders.

The recoil pad was almost certainly added by someone and if it is like the one on my 1952 vintage 30-06, hard as a board. You would do well to change it out to something softer. I really like the Pachmayr presentation pads. They look good and work well enough. The ultra soft ones are good to, just harder to install and make look good.

Have fun


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I shoot the 300Super/30-8mmRem Mag and like it purty good,as far as belts go.

Much better than H&H....................


Brad says: "Can't fault Rick for his pity letting you back on the fire... but pity it was and remains. Nothing more, nothing less. A sad little man in a sad little dream."
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The recoil really isn't noticeable, so no point in replacing what my Grandpa had done. Plus, the pad on it right now looks really cool, IMO. What sorts of velocity do you get out of the 168 TST pushed by those powders?

Does anybody own or have previously owned anything chambered in 300 ICL Grizzly? I'm curious if this is closer to the round I shoot than the Wby is.

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In my 26",I dote on the 165XLC in front of Re-22 and crowding 3400fps +.

8mmRemMag cases,formed with a false shoulder,to control headspace outta da gate.

Had another in a 30" spout and retained the 26"..............


Brad says: "Can't fault Rick for his pity letting you back on the fire... but pity it was and remains. Nothing more, nothing less. A sad little man in a sad little dream."
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Big Stick, do you have any pictures of a fired 300 Super case? I'd like to see how similar ours are.

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Campfire Kahuna
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'Bout like this................


[Linked Image]


Brad says: "Can't fault Rick for his pity letting you back on the fire... but pity it was and remains. Nothing more, nothing less. A sad little man in a sad little dream."
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Interesting, I'm diggin' your color coding haha! I hate to trouble you, but could you perhaps post a close-up photo of a fired case for me? Thanks!

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