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I need some help with a project… This is a long range hunting/dong ringing Rig. I have a McMillan A3–5 stock, Ruger M77 MKII 7mm Rem Mag Action and Bottom Metal. The bottom metal blow be replaced with a PTG bottom metal so I am looking for barrel suggestions and of course caliber and cartridge. I would like to stay in a 6.5 mm range and was thinking of something along the lines of the 260 Nosler, 260 Thor or any other ideas that you may have that would fit the PTG bottom metal and be safe in this action. I also need suggestions on a fluted barrel in stainless and a twist rate… So I manufacture and a contour would be helpful as I'm new to creating recipes for custom rifles. This is a list of what I have so far so that I can avoid duplicating: 1.Winchester Model 70 Stainless Featherweight Adult/Youthcombo.Walnut NH 100gr ttsx 2. Ruger stainless RSI Lipsey's Limited-Edition 257 Roberts. Walnut 100gr TTSX 3. Remington 700 custom 300 WinMag. McMillan 130gr TTSX 4. Ruger M77 Stainless 7MKII 338/06 in a McMillan Swirly 210gr TTSX 5. Ruger M77 MKII Stainless 350RM Shilen 21" McMillan Swirly 200gr Hornady 6. Marlin 1895 450M 300 TSX Black T Finish Walnut So I am missing a .224,.260.277.280 and Dangerous Game Calibers which I hope to remedy with a Winchester Model 70 Pre 64 375H&H as soon as I sell my Geovids. I would like to stay in the 260/6 mm range for BC and the style of rifle… Any suggestions are appreciated. Thanks Robert Bruz "Honor,Courage and Character" NRA Lifetime Member | ||
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bruz, Not sure why you're asking for input. Seems you have knowledge enough to draw conclusions suitable to your quest. Pick a starting point and fill in the resultant blanks your quest will create. I do not wish to come across as negative so, Luck, Stephen Luck, | |||
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Your action is a Ruger MkII in 7mm Mag = Long action with magnum bolt face. Why not stick with a standard length magnum cartridge? PTG has long bottom metal for the Ruger MkII in stock. You want long range ballistics and you want a 6.5mm/.260/.264 caliber so why not something like the .264 Win Mag or 6.5x68mm? There are also several 6.5mm magnum wildcats to choose from. You might also consider the .257 Weatherby Mag and .270 Weatherby Mag because they are close to (almost) 6.5mm. Of what I mention above, I think the .257 Weatherby Mag would be my choice. . | |||
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Stephen Thanks and no offense at all. I didn't state my questions clearly. 1. Which Wildcat will fit the Mag Box? 2. How high pressure will the MKII Action withstand? 3. I'm really wanting a Wildcat...I owned and sold a 264WM MRC Stainless in a McMillan and was't that impressed. 4. The Goal is to build a .264" Laser...I would like to reach 3,400-3.500FPS.
Bruz "Honor,Courage and Character" NRA Lifetime Member | |||
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Bruz "Honor,Courage and Character" NRA Lifetime Member | |||
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Are you familiar with the Lazzeroni Scramjet? It is a .257 Magnum. 100 Grain Nosler Partition @ 3700fps+, 115 Grain Nosler Partition at 3500fps+ and at less than 60,000 CUP. And there is the Nosler 26 which is based on a RUM case. Nosler load data shows 129 grain bullets edging up toward 3400fps. That's a bit faster than the 6.5x68mm. The 6.5x68 holds 86.1 grains of water and the .26 Nosler holds 93 grains. For comparison, the .264 Win Mag holds 81.5-82 grains of water, depending on source. All the rounds I've mentioned should fit your action.
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The 26 Nosler is going to be very hard to beat given your magazine length. The faster cartridges that I am aware of are all 3.6" OAL based on the full length RUM case, or 404 case. Or the 6.5mm Fatso based on a shortened 416 Rigby case. Jeremy | |||
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The 26 Nosler or you could look at the 6.5x284 it has some good numbers for distance shooting. The one I have is on a Rem 40x action Benchmark barrel nf nxs 8-32x56 scope works well | |||
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Using your action as others have said the 26 Nosler would be my go too. Or a wildcat based on a shorter RUM case. Maybe Jeffe has played with one. You didn't say why you were not impressed with the 264. Unless you go LONG barrel I think a larger case will not impress you either. Based on the throat life I found playing with a 7STW I don't even want to think about something larger than the 264. But that is me. As to the action the MKII will be there long after your brass and primer have given up. As usual just my $.02 Paul K | |||
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I am getting 3350-3400fps with my 264 WinMag using 127gr Barnes LRX's and a 77gr charge of US 869 powder. My rifle is a Winchester M70 Extreme Weather with a 26" barrel. If I wanted more velocity than that, the 26 Nosler would be my next stop and I would go with a 28" barrel. | |||
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Darn right you need barrel. Just playing with QL going with a 140gr Nosler a 6.5-300Wby only calculates 40fps higher than the 264 with a 26" barrel and equal pressure. I "think" the 6.5 Nosler has less capacity than the 6.5-300Wby. As usual just my $.02 Paul K | |||
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Thanks to everyone. I think a 260 Nosler in a 26" Lilja #5 or #6 Stainless Fluted shooting Bergers and TTSXs should fit the bill. Lilja should be able to tell me which contour a "McMillan Heavy Varmint" would fit....Correct? I"ll post pics and updates as we go. Thanks again Robert Bruz "Honor,Courage and Character" NRA Lifetime Member | |||
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They either know, or will ask for you to measure the barrel channel width at specific points. Either will get you a barrel that fits your stock. What twist are you thinking? 1:8 for the 140gr Bergers? Jeremy | |||
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I am going to try the 120gr TTSXs and 130 Berger Hunting....So do you think a 1:8 would be a good option? Thanks Robert Bruz "Honor,Courage and Character" NRA Lifetime Member | |||
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Longer range says longer heavier bullets so 1:8 is what I would choose. As usual just my $.02 Paul K | |||
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I don't think it would hurt to go with a faster twist. Adds to the versatility of the rifle. With 120's, you probably won't need it. With long 140's, you will. If you go to the mono-metal Cutting Edge, you need it for the 130gr pill. Those are pretty bullets. They just look mean. My experience is that out to 600 yards, it is a wash, past that, the 140's start to really come into their own, especially with doping the wind. This is in a 6.5/284. Jeremy | |||
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Sell the Ruger action and buy a custom action. Build it in 6.5-284. As farbedo says, doping the wind is the challenge, and velocity doesn't really do it - high BC and accuracy does. | |||
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Bruz, I'd go with the 26 Nosler. But I'd increase the barrel length to 30". 1:8 twist and shoot Bergers through it. I use a 30" 264 WM for a lot of long range roo shooting. That extra barrel length makes a lot of difference with an overbore round like the 26 Nosler/264 WM | |||
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Blair, At 30 inches I might be heading toward about a 20 pound rifle. LOL but I take your word for the 264 I have no problems whatsoever it was a McMillan stock it was built on an SS MRC action and once I straightened out the feeding issue because whoever built it put a 358 normal spring and fall aware and it would shoot in the 70s all day long… I took several deer with the rifle and had no problems with it it just didn't "strike my fancy" Thanks Robert
Bruz "Honor,Courage and Character" NRA Lifetime Member | |||
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