6mm-264 info

[remingtonman_25_06]

I just picked up a rem 700 BDL stainless/synthetic in 300 Win mag from my uncle for a pretty good price.

Original plan was going to build something in the 375 or 416 area just to have something big and different. However, I really have no use for it and its pretty expensive to shoot those bigger rounds.

My current rifle battery consists of a .222 rem, 264 win mag, and 7mm RUM. Seems to me I need another coyote rifle...

So, I've been trying to think of a good coyote round that I could build off a magnum boltface. I havne't came up with to many ideas yet, but I did come up with the idea of necking down a 264 case to 6mm, put a 28" stainless pacnor with a 8 twist and have it shoot the 87g vmax-105g amax. I know it would be overbore, but it shouldn't be to much more overbore then say a 6-06 AI...Would be a helluva LR yote round I would think. Would be simple case making process, just run a 264 case through the 6mm-264 sizer, load, and fire.

Anyone have any input on such a build? Anyone ever hear of one? Problems I might run into? Any other suggestions or ideas on builds for a coyote rifle off a magnum boltface?

 

[Woodycreek]

Don't know anything about it but it sounds like a fun 6mm.

 

[usmc 89]

sounds interesting, but i think you have surpassed the point of diminishing return on that one. you can only force so much gas through a certain diameter and i think the 6-06 is already too much onion for that bore diameter. but hey build it and lets see what happens. i would use the heaviest bullet the 1-8 will stabalize in .244.

 

[SJB358]

Don't know anything about it but it sounds like a fun 6mm.

It sounds right up your alley Brian.. If I were you though I would stick the RUM case, ya know, just to keep things easy! :lol:

 

[Woodycreek]

If it would work, I would build it. 243RUM just sounds bad#$%.

 

[CAhunter]

Sounds like an extremely overbore rifle to me but also fun. You would essentially be building a 6mm Mach IV without the steeper shoulder angle. If you are already planning to rebarrel you could trade the Mag bolt for a standard bolt and have the action buleprinted and you would be fine. Then you could build something like 6-284 or 6-06 heck even a 243 on a long action. Would be perfect throated for heavier bullets like 105amax,105VLD in a 1-8 twist.

 

[jmad_81]

Just go "big" already! You have enough little guns! :lol:

 

[FOTIS]

That would be a variation of the 6mm Mach 4. The mach 4 is based o the 7mm rem mag case. Barnes TSX type bullets need only apply.

Ross Seyfried did this in the 1990's.

 

[BK]

That would be a variation of the 6mm Mach 4. The mach 4 is based o the 7mm rem mag case. Barnes TSX type bullets need only apply.

Ross Seyfried did this in the 1990's.

That's what I first thought too.

 

[filmjunkie4ever]

Honestly Remmy though components would be more spendy, I would vote for the 257 Roy. But then again I am just a .25 caliber freak. Although I only own one, (25-06)I have shot all of them at one time or another.

Then too you have the versatility of the heavier bullets (100-120) grainers if you wanted and then also you wouldnt be overbore as much.

 

[IdahoCTD]

You could do a .243 WSSM but it would feed like crap on a long action without tons of work. You could also do a 6mm-6.5mm Rem Mag (with a spacer in the back of the mag and a shortened follower it should feed fine). It would be about like a 6mm-.284. I have a reamer for a 6mm-.300WSM but still haven't built one. The smallest and easiest/cheapest would be a .257 Weatherby. It doesn't get you to 6mm but it's a standard round with cheap dies and easy to get/form brass. A 6mm-.264 Win Mag without the blown out shoulder of the Mach4 would be easy to do as well plus you already have a .264. Buy a set of bushing dies for the .264 if you dont have them, cheap brass, and short barrel life :grin: . If I remember right he had severe carbon fouling with the Mach 4 and bad throat errosion in under 600 rounds.

Like has been mentioned you can always trade for another action or trade bolts to get a .473 bolt face (.308/.30-06). The lugs should be lapped before chambering a barrel anyway. With a standard bolt face I'd probably do a .243 AI with the throat cut long enought to seat 105's to the base of the neck.

 

[JD338]

The 257 Wby would make for a great chambering in that rifle. If you want something different, look at the 6.5mm Rem Mag. You can seat the bullets way out there. The 264 Win Mag would also be a great long range choice.

JD338

 

[BK]

A .240 Weatherby uses the standard '06/.308 sized bolt head, right?

 

[filmjunkie4ever]

Yeah Kurt it is .473 just like the 30-06.

Thought about making one of those 240 WBY's one time but looked at the numbers and because it is overbore it truly isn't any better than a 6mm Remington or a 25-06 which at the time I had both. Still have the 25-06 which is the one reason I don't have a 257 WBY. Just don't need one with a 25-06 around.

I let that little four lettered word (need) get in the way of so many good ideas! :x

 

[BK]

Not for me, Dale!

 

[1Shot]

The 257 Roy would be my choice. If you really wanted to go WILD. You could do a 257 STW. I have a friend that has one and it is a screamer but again Barns TSX bullets are all he can use at those speeds. Regular cup and core bullets just sling themselves apart going down range at over 4000 fps. He deer hunts over bean fields with it. Those 100 TSX at 4000 fps or so really shoot flat and put the POP on a deer.

 

[efw]

... though components would be more spendy...

I would definately go w/ the 257 Weatherby if I were you, but I have to disagree with the above statement because you can do the same thing w/ the Bee that you can do w/ the wildcat you're proposing.

I'm just necking down 7 RM brass and fireforming it. One run through the FLS die and there is just a little taper obtained in the first firing. Then I anneal the necks and fire away. I suppose you could do the same thing w/ 264 WM brass.

100 gr TTSXs at approx 3600 fps w/out stressing things at all... oh yeah.

 

[remingtonman_25_06]

Thanks for the input guys. Gave me some more to think about.

Ill just hold onto it and keep the ideas building.

I do like the 257 WBY idea for a LR coyote rifle it couldn't be beat really...85 nbts at 3800 would get er done for sure...Hmmmmmm

 

[okie2]

but I did come up with the idea of necking down a 264 case to 6mm, put a 28" stainless pacnor with a 8 twist and have it shoot the 87g vmax-105g amax. I know it would be overbore, but it shouldn't be to much more overbore then say a 6-06 AI...Would be a helluva LR yote round I would think. Would be simple case making process, just run a 264 case through the 6mm-264 sizer, load, and fire.

Anyone have any input on such a build? Anyone ever hear of one? Problems I might run into? Any other suggestions or ideas on builds for a coyote rifle off a magnum boltface?[/quote]

WHY DO YOU WANT AN 8 TWIST FOR 87 GRAIN BULLETS?
ALL 6MM GUNS SHOOT 55 TO 100 GRAINERS FINE WITH A 1/10 TWIST
AN 8 TWIST WILL MAKE YOUR BULLETS COME APART IN MID AIR.