Does anybody know if its possible to rechamber a Ruger #1 Tropical in 416 Rigby to 585 NYATI?Who do you know that can do it.

Re-chamber, no, as the bore is too small, and a re-bore is a no-go as the 1/4 rib pin and screw holes are bored too deeply, even 50 caliber will require a re-barrel due to the 1/4 rib mounting issues.

This issue has been covered in depth in previous threads. The practical limit of the Ruger #1 is a 500 NE, you will compromise the action if you go bigger. The 585 Nyati would also be a poor choice as rebated rimmed rounds are at most less than ideal for the extraction system of a falling block. If you were to go big, 577 NE is the way to go. I believe SSK does this work, but it won't be cheap. For what it would cost to build a 577 NE #1, you could get a 585 Nyati bolt gun built.

PAUL H, Thanks for your info. Any suggestions on who could build the bolt gun with-in a limited budget,say $1500-$2000 U.S.?

You might want to consider the 550 Magnum, which is the 460 Wby necked up to a straight case.

There is quite a bit of material on this forum on the 550 and the people behind seem to have everything well organised. Well I thought so as I sent $1200US over for long chambered barrel, dies and sights. There is also headstamped ready to go brass for Qulaity Cartridge.

In my opinion the 550 is the best of the real big bangers and for a couple of reasons. Firstly, while in theory the 585 has more power with its bigger case some of that power edge will be lost because of soft brass. Also, the 550 is already going to develop more power than 99.99% of people can shoot in a shoulder rifle. In other words, whether you have a 550 or 585 you will be using less than full power loads. Apart from the brass advantages the 550 has it is also ideal for conversion of the CZ 416 Rigby or any Wby in calibres such as 30/378. It should also be easy to convert a Ruger 1 in 416 Rigby to the 550 and they are basically the same case, remembering that the 460 Wby is virtually a 416 Rigby case with a belt added.

Mike

Honestly, if you are on a budget, consider the 500 A-square as a prudent way to get serious affordable power. The gun price is only part of the picture, when you look at the componets, that adds a signifigant increase in the package price.

Get a CZ-550 416 Rigby and have it re-barreled to a 500 A-square, and the stock re-inforced. Total for that should be in the $1200 range, add $300 for brass and dies, and anything left over for powder and bullets.

If you go to a 585 Nyati, your brass and bullets will be roughly double that of the 500 A-square. Having shot a not even max load out of my 500 Jeffrey, 600 gr @ 2200 fps, I can assure you that you will never consider such a gun wimpy. Even mild pistol cast bullet loads, say a 470 gr @ 1100-1200 fps lets you know it's a real gun.

Mike375,Any thoughts on who could do the smith work w/a CZ 550 action to 550Magnum? PAUL H,Any thoughts on who could do the smith work w/a CZ 550 action to 500ASQUARE?

If you want the Nyati that's exactly what you should get.A good friend of mine has 2 and I have shot the Nyati a couple times it is an awesome caliber..

I've had John Ricks barrel three rifles for me, and he does top notch work. Only problem has been he's been burried with work and I don't know if he is taking on any more work at the moment. He would be my first choice, do a web search for shooting star rifles. I'm not sure if he has a 500 A-square reamer, though he can do a 500 Jeffrey. I wouldn't go that route due to brass issues, having gone that route previously.

Having played the component availability game, I would personally be leary of going with the 550 until it has been on the market for some time. No fun having a fun toy with nothing to shoot down the barrel. Even 50 cal componets can be hard to come by, go bigger and it costs more, and is even harder to find.

Capstick,

Go this thread started by RNS

http://www.accuratereloading.com/ubbthreads/showflat.php?Cat=&Number=615632&page=0&view=collapsed&sb=5&o=7&fpart=1

At the bottom of his first post you will also see a link to the 550 Home Page.

My money went to the gunsmith Michael Scherz (spelling) but I am only having the barrel work done and then sent to Australia so it can be fitted to a Weatherby Mark V out here. I think I remember RNS telling me that I was the only one doing a Wby and everyone else was the CZ

I suggest you email RNS or psot up a topic on the 550 and will surely respond if he is about the place. From what I can gather the CZ 550 is the rifle for conversion to the 550 Magnum.

Mike

Mike... why are you going wby for your 550, if you dont mind me asking?

smallfry

I am putting together some Wbys via their custom shop. The first pair, both 378s, should arive in Australia around June and a pair of upgraded 30/378s will also be coming. I was going to include and upgraded 460 but at the same time I was keen to have someting on a Wby that was done up but not via Wby themselves. So the 550 is the go instead of the 460 and also fits the rifle on the done up Wby but not via the custom shop. I am going to use a 30/378 Synthetic for the conversion because of the matte blue action and will have the 550 done along the lines of a Wby Euromark. The plasit stock off the 30/378 can be used for rough shooting condition for one of the 378s.

Thus in short, all my rifles will be Wbys and so the CZ 550 would have been a foreigner

Mike

Dave K,Do you know who put together your friends 585 Nyati rifles?

Mike... I have 2 WBYs, a 340 and a 378. The 340 does not shoot very well, and I have never fooled with it to understand. The 378 shoots very well. I have taken it on a few hunts. Right now I am screwing around with finishing a 500a2, slow going. I would have done the 550 had I not already started my 500a2. Its in a cz550

smallfry,

I think if I had a genuine big game use for a big banger I would take the 500 A2 over the 550. But for me it is in the "just have" area and will bust a few kangaroos, pigs and rocks and also to play about with cast and paper patch and that for that I prefer the straight case. It is kind of like a fat 458 Lott.

Is your 378 one of the light barrel Japanese ones or the heavier 416 barrel contour with brake that are US made. What sort of loads are you getting good accuracy from.

Mike

If you do have a moderate-sized budget the availability of surplus military .510" diameter bullets in the range of 21-25 cents each (haven't checked lately) for practice, is an important consideration.

mike... my 378 is a rebarreled Mk5 with a pac-nor 26 CrMo tube. I have used 4831, but get more velocity with less fuss with 7828... I do not know if that is a standard powder in AU. I have heard but have not tried Reloader 22 in a 378. I shoot mine at a flat 2900 with Barnes X. It does not have a brake on it. I wouldnt own a rifle with a brake, even if all I had was a cold chisel and a hammer

smallfry

Is yours the standard Weatherby 378 freebore.

I have a small supply of Re 22, Re 25 and 7828 that was obtained about 3 years ago when these powders were brought in. A few years before that we use to get regular supplies of the Reloader powders. And of course we have all the Australian made powders that Hodgdon sells as H4227, H4198, Varget, H4350, H4831 SC, H1000 and 50BMG. However, I expect that 99% of loads I will use will be about equal to 375 H&H so I guess I could use black powder to satisfy that goal

I have previously owned two Japanese 378s and Reloader 22 gave top speeds in them. The very light barrel of average quality in those Japanese 378s makes them very fussy with loads. All the 378 based Wbys from 30/78 to 416 Wby have the same barrel contour and it is the same contour as used on the Accumarks, about .72" at the muzzle.

Mike

Per my husband. Simply rebarrel a Ruger No1 in 416 Rigby. Use the Nyati case with the Rigby rim. Job done! Pac Nor will rebarrel your rifle for ~ $500. The 500 A-Square is done in the exact same manner.

Judy