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300 Win Mag Project?
So I am a bit nutty for long range shooting at the moment. Its a great way to spend the money I now don't spend taking the boat out over the Manukau Bar.
I have shot a few events including the NZ Vortex Mountain Challenge and the next weekends Alpine Long Range. I am shooting a 7mm Mag and its great fun. I have a 330 Dakota getting sorted at the Gun Smiths that will be my (who cares if its stupid rifle). To take the strain off the 7mm I am looking to get a 300 Win Mag. I have a 1949 Winchester M70 Action that I am considering using for this project. A suitable off the shelf rifle would be cheaper and less trouble by the time I pay for a new Barrel. Action truing,Trigger, Bedding, Cerakote finishing the stock I have etc. etc.
So the questions I am considering are.
1 Is this old action suitable for this type of build. (strength and inherent accuracy
2 Is there a factory rifle out there that would do the same job and not go to the expense of a semi custom build. It would need at least a 1:9 twist to shoot 230-240gr bullets. Tikka Super Varmint 1:11 Remington Sendaro 1:10 so no good.
Any out of the box suggestions would be appreciated.
Thanks
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I had a Rem 700 xcr tactical in 300 win mag - it was a good shooter but iv since had a go with Rem 700 5r 300 win mag and it was alot better accuracy wise and the barrel was way easier to clean.
So I would definitely get the 5r Rem 300 win mag if I was in your position.
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If you are interested I have a heavy barrelled target rifle in .308 built on a p14 late model winnie action. They are strong enough to upsize. I was considering rechambering it to 300 win mag for a similar purpose, but have shelved that idea now. Twist is 1:9 from memory and I have shot 220 gr through it. Single shot action only though
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Thanks guys. I think I would struggle to use a 308 length action for a belted magnum cartridge thanks for the offer. As I said the trouble with the Rem 700s as nice as they are is their 1:10 twist is too slow for a 230-240 gr bullet. I will keep pondering on it.
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Used 230 bergers through the Rem 700 it was a solid 1/2 moa shooter with them it also loved the 208 amax ,don't get to hung up on twist
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I'm having a 300win mag built at present thanks to 7mmsaum & ideas man shift14.
Sako Finnlite 300win mag - completed
Ken Henderson carbon fibre stock - completed
Threaded for SSRNZ can - underway
Topped with Swaro X5 3.5-18x50 scope from Black Watch Reloading - completed
7mmsaum cooking up some loads
Underway selling a bunch of stuff that never gets used and will be sticking with this cannon.
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Thanks VTF for you insights. I don't want to finish a project only to find it wont shoot the projectile I want. How far out did you shoot the 230gr Bergers. I want stability out past 1600m. Their stability calculator says ok at muzzle but marginal once the velocity starts to fall off. I would be interested to know how your Remington went way out there.
300winmag to looks like you will have a real weapon with that rig. Mine will be a much more budget model.
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Looking at the price of a Remington 5r (around $2500) , if it was my project, I d go with a custom action like a Barnard and a 30 or 32or 34" barrel.
It might end up a bit higher in price but you will be able to push those heavy pills easily without stressing too much your brass and your barrel.
My first long range rifle was a Remington rebarrelled in 300 win mag with a thirty inch barrels. It shot very well, but I never took it past a km.
I have rechambered it in 300 ultra mag, launching the 208 amax at 3100fps, but we were loosing the vapor trail before reaching 1700 yards .
Regarding the p14 action offer above, the p14 is a very long action. It is know to have been rebarrelled in the 577 Tyranosaurus cartridge by A-square . I own one in 300 h&h but with a1 in 14" target barrel.
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I have a Ruger M77 MkII LA that has been built up to .300 Blaser Magnum (unbelted) unfortunately haven't had a chance to stretch it's legs out, but from what I understand more than capable out to 1200m +
The barrel and rest of the work was done by Hugh Bradley, it is a 25in 5R heavy barrel 1:10 capable of throwing heavier pills, threaded for suppressor. 2 tone cerakoted (all stainless).
I've used Norma 200g Oryx in it and obtained <1/2 MOA at 100m. only 57 rnds down it.
It is currently for sale as I'm not likely to use it to it's potential, just throwing out there as an option. :)
As a side there are brand new dies and 100 new Norma brass available.
Drop me a PM @Dermastor if you'd like to know more mate. Cheers Craig
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You would have a custom rifle built on a pre-64 M70 - the rifleman's rifle - in a classic caliber. Nothing more to say really.
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Dont worry about twist rates too much. My sako 85 is an 11 twist and im shooting 230s at 2940 fps and they are extremly accurate
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Thanks for your thoughts guys. Craig how can you sell a rifle like that, I will pass thanks. Puffin you are right I will probably end up building on the M70 action but sometimes a different perspective can offer better solutions. I know what you mean Pongo at the muzzle or inside 1000m things can be ok but get down to under 1000fps and a slower twist rate can take its toll with instability especially past the transonic I am glad that rifle is working well for you.
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Allgood but you do realise at 2000m its still going 1020ftps. How far are you wanting to shoot? 2km is a fair distance
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Pongo the property we shoot on up Burkes Pass sort of goes forever. We have shot out to 1600 and will be down again in a month and would like to shoot out further. Scope clicks become an issue so hold overs become the norm. It is great fun and a mathematical challenge.
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bloody ideal. long way alright