6.5mm Super in the works.

stonehands1

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Feb 25, 2015
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121
Just thought I'd share my new build. We'll a little bit anyway. I'm a big speed freak to say the least. My current .308 pushes 150 grainers at 3775 out of a 26" tube. I love how flat shooting it is and it does the job on animals.
I'm totally into the 6.5mm but can't find one that will push the 142 grainer at 3700+ so I've decided to build one. Can't take all the credit cause I'm getting some help from the pros but am super excited about the potential of this build. Yep it will burn the shat out of barrels but I really don't care. Still working out all the details but here are
Some of the basics:
Sako m995 action.
Benchmark 30" tube
McMillan A5 stock
 

MudRunner2005

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Oct 13, 2008
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14,708
Location
Alabama
Just thought I'd share my new build. We'll a little bit anyway. I'm a big speed freak to say the least. My current .308 pushes 150 grainers at 3775 out of a 26" tube. I love how flat shooting it is and it does the job on animals.
I'm totally into the 6.5mm but can't find one that will push the 142 grainer at 3700+ so I've decided to build one. Can't take all the credit cause I'm getting some help from the pros but am super excited about the potential of this build. Yep it will burn the shat out of barrels but I really don't care. Still working out all the details but here are
Some of the basics:
Sako m995 action.
Benchmark 30" tube
McMillan A5 stock
You mean 2,775, right? You're about 1,000 fps faster than the normal speed...

You're not going to find many calibers that will push a bullet over 3,500 fps... I think you might be a bit misguided on your numbers.
 

stonehands1

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Feb 25, 2015
Messages
121
I most definitely mean 3700. My current .308 will actually shoot 130's at close to 4000. But that's obviously not some super accurate long range combo. Not that it's horribly inaccurate, just not sub moa. But if you want to see some coyote carnage at 100 yds then the 130's are the ticket.
100 grains of 7828 gets the 150's moving. I'm still working on a 180 grain combo and have seen a best of 3625 using 107 grains of r25 but it's hard on cases. 114 grains of H50bmg is easier on cases but a fps is down a little. Like I said still working on that recipe.
Basically I'm going to neck down my current .308 case to .264 and shoot 142's unless someone makes something a bit bigger. Would like to shoot 150ish size pill in 6.5mm but not sure if that is even an option.
 

MudRunner2005

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Oct 13, 2008
Messages
14,708
Location
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I most definitely mean 3700. My current .308 will actually shoot 130's at close to 4000. But that's obviously not some super accurate long range combo. Not that it's horribly inaccurate, just not sub moa. But if you want to see some coyote carnage at 100 yds then the 130's are the ticket.
100 grains of 7828 gets the 150's moving. I'm still working on a 180 grain combo and have seen a best of 3625 using 107 grains of r25 but it's hard on cases. 114 grains of H50bmg is easier on cases but a fps is down a little. Like I said still working on that recipe.
Basically I'm going to neck down my current .308 case to .264 and shoot 142's unless someone makes something a bit bigger. Would like to shoot 150ish size pill in 6.5mm but not sure if that is even an option.
What .308 are you talking about? .308 Winchester?
 

Boman

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Sep 25, 2002
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colorado
I'm taking a guess and saying he has either a Warbird or a 30-378. Based on that sako action.

To the Op: you should do a search for Swamplord. He has designed cartridges that accomplish what you're after. He's even using the same action. Very cool stuff.
 

stonehands1

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Feb 25, 2015
Messages
121
I'm taking a guess and saying he has either a Warbird or a 30-378. Based on that sako action.

To the Op: you should do a search for Swamplord. He has designed cartridges that accomplish what you're after. He's even using the same action. Very cool stuff.
Thanks Boman. I'll check out swamplords build.
 

Wachsmann

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Feb 1, 2008
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Location
Idaho
Not to hijack the thread but is it possible to get 3000fps+ out of a 6.5x284 norma with a 26 inch barrel shooting the 140grn or 142grn bullets? Or should I be looking something more like a 264 win mag.
 

reeldawg

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Mar 12, 2011
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Location
Florida
Check out a 6.5 Sherman if you want over 3000 fps. It's not going much over 3200 fps, but the barrel will last a lot longer.
 

264WM

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May 15, 2012
Messages
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Location
Loomis, WA
You need to read Swamplords post. He has created the 6.5 Pro that pushes the 140gr bullet to 3700fps. He has set up for it to go into production. The 264 WM is good with the right powder combo. I have pushed a Woodleigh 160gr PPSN to 3261fps which is out of a Remington 721 with a 30" Shilen barrel with 6 grove 1 in 8 twist.


Prometheus.... the Bringer of Fire..... is reborn !

Bullet Weight:
140 gr

Muzzle Velocity:
3700 fps

Muzzle Energy:
4257 ft-lbs



AmmoGuide is now... "Interactive"!



The original case dimensions were created in May 2011 for the "7.62 PRO" then re-designed and necked down to 6.5mm in February, 2012 by Pro Martusheff specifically for the Sako TRGS M995 action. The idea evolved in the spring of 2011 and became reality when KRG Welcome to KRG made a stock for the SAKO M995 that uses AICS "CIP" length 5-10 round magazines, The parent 338 Norma Magnum was perfectly suited for this action and and AICS mags.

Given the amount of powder it burns for the 6.5mm bullets, the wildcat was originally named "6.5 Prometheus" to pay homage to the Greek Titan Prometheus (the bringer of fire) who stole fire from Zeus and gave it to man. The short name for it is 6.5 PRO (Precision Rifled Ordnance). Basically it's a 6.5mm cannon that brings fire. The shoulder was changed to 35° and neck length to .342", the base of the case was retained at .589", the shoulder pushed forward to 1.9549" , I wanted a bit more taper in the case for extraction when shooting high pressure max loads and the width at the top of the body is .570" giving the case a .019" taper
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