Long Range Hunting Online Magazine


Go Back   Long Range Hunting Online Magazine > Rifles, Reloading, Optics, Equipment > Rifles, Bullets, Barrels and Ballistics


Reply

New 6.5 Idea

 
LinkBack Thread Tools Display Modes
  #8  
Old 01-28-2013, 02:21 AM
Platinum Member
 
Join Date: May 2001
Location: Casper Wy
Posts: 1,318
Re: New 6.5 Idea

__________________
"Make everything as simple as possible, but not simpler." -Albert Einstein (1879-1955)
Reply With Quote
  #9  
Old 01-28-2013, 07:19 AM
Platinum Member
 
Join Date: Jan 2008
Location: Northeast
Posts: 2,325
Re: New 6.5 Idea

The concept of 6.5x284 performance with a 140 Berger from a short action is appealing, but sounds like a tall order as described. Superb accuracy, and very low ES at 2950-3050 FPS is the primary attribute, and many would maintain, so far, the uncontested domain of the 6.5x284 when it comes to the 6.5's. I will be very interested in the unveiling of your cartridge.
__________________

"Let us speak courteously, deal fairly, and keep ourselves armed and ready"-T. Roosevelt
Reply With Quote
  #10  
Old 01-28-2013, 11:12 AM
Official LRH Sponsor
 
Join Date: Dec 2006
Location: Utah
Posts: 125
Re: New 6.5 Idea

The case will hold 50+ grains of powder and we pushed the shoulder back to the area that a 6.5-284 would lose in a short action because the bullet was taking that area up any way. The long neck allows the bullet to be left out of the case area. Its been a fun project and we are not trying to market it just thought it would be fun to show what we were playing with. You must take in to consideration that 6.5-284'S work much better in a long action or single shot in a short and the 260 remington loses case capacity to the bullet being seated to far into the case also.
Have not came up with a catchy name yet, it's been 15 degrees or snowing and we haven't done much testing but it will be wrung out over a chronograph and I will let you know how it works out. I have some cut away pictures of the brass showing what we are trying to achieve and I'll get somemore pictures posted. Quickloads shows with safe pressure we should get 3075 FPS when the weather breaks a little we will see. BS or not.
__________________
Steve

Elk Meadow Performance
www.elkmeadowperformance.com
Reply With Quote
  #11  
Old 01-28-2013, 11:41 AM
Gold Member
 
Join Date: Dec 2009
Posts: 884
Re: New 6.5 Idea

I think it was David Viizzard who said something to the effect that he doesn't have opinions he has dyno test results. Ultimately, the hard data you develop will trump anyone's opinion.

It will be interesting to see how your project comes along and how close the real world results are to the modeling data provided by Quickload. If it proves out, I can certainly see the appeal of your cartridge design for folks who prefer short actions.
Reply With Quote
  #12  
Old 01-28-2013, 06:19 PM
Silver Member
 
Join Date: Jan 2005
Posts: 338
Re: New 6.5 Idea

Since I'm the guy that dreamed this cartridge up, I guess a little more info about the cartridge and why I think this will be a great little round. First of all I have done this before with an RUM case to make a very potent 7mm. The case was shortened from 2.850 to 2.555 with less taper and a 35* shoulder and a bit longer neck so that a 200 gr Wildcat bullet could be seated where I wanted it yet not need a Wyatts box to be a repeater. It worked very well with performance a bit better than the parent 7mm RUM case performs in a factory Remington, using 10 to 12 grs less powder.

That was 12 years ago and has proven to be a very accurate and efficient cartridge so I decided I would give it another shot with the 6.5- 284 case. I shortened the case to 1.970 with .320 neck length with enough taper removed so it could not be accidentally loaded into a 6.5 - 284. I kept the 35* shoulder because 35* shoulders work very well. The case holds 54 gr to the base of the neck compared to 50 gr in a 260 Rem. case, 47 gr in a Creedmore case and 44gr in a 6.5 x 47 case. The 6.5 284 case is about a 62 or 63 gr case. All these capacities are water to the neck shoulder junction which is the best comparison of these rounds. I believe the reason that this round will perform as well as the 284 case is because it gets you to a better burn rate in powders (H 4350?) that will fill the case closer to 100% I hope I'm right.

Steve and I worked together to design the step down dies and Steve did the machine work on the dies and rifle and is painting it as I'm writing this. ( Steve has a bunch of sweet shooting guns to his credit by the way.)

The brass is super hard to make so this isn't for the faint of heart to try to do this. We're going to do three guns total since I have made 500 pcs of brass and will not be doing any more if I can help it.

These are fun projects and hopefully this 6.5 will work well !! We will try to get more pictures up soon. -------- 7mm RHB
Reply With Quote
  #13  
Old 01-28-2013, 07:37 PM
Platinum Member
 
Join Date: Nov 2008
Location: Central Pennsylvania
Posts: 4,041
Re: New 6.5 Idea

Just tagging in.
__________________
Matthew 7:13-14
"Enter through the narrow gate. For wide is the gate and broad is the road that leads to destruction, and many enter through it. [14] But small is the gate and narrow the road that leads to life, and only a few find it.

If you find your self in a fair fight, your tactics suck!- Marine 1st Sergeant Jim Ryfinger

Friends don't let friends develop canonitis!-chucknbach

arguing over the internet is like the special Olympics....even if you win, you are still...special!
Reply With Quote
  #14  
Old 01-29-2013, 08:31 AM
Platinum Member
 
Join Date: May 2008
Location: South of Canada and North of Wyoming
Posts: 5,953
Re: New 6.5 Idea

[quote]
Quote:
Originally Posted by 7mmRHB View Post
Since I'm the guy that dreamed this cartridge up, I guess a little more info about the cartridge and why I think this will be a great little round. First of all I have done this before with an RUM case to make a very potent 7mm. The case was shortened from 2.850 to 2.555 with less taper and a 35* shoulder and a bit longer neck
First, good work on you're new 6.5 offering. Next, if I'm reading you right, you reinvented the 7 Dakota with a 35* shoulder and long neck? I'm actually thinking of doing a similar Imp Dakota in 7mm, 270 and 6.5. they are quite efficient rounds. The Dakota fits nicely into mag boxes with long, high BC bullets.

Quote:
so that a 200 gr Wildcat bullet could be seated where I wanted it yet not need a Wyatts box to be a repeater. It worked very well with performance a bit better than the parent 7mm RUM case performs in a factory Remington, using 10 to 12 grs less powder.
Are you actually saying That your 7 wildcat (Dakota Imp) performed better than a 7 RUM? By performance, I'm assuming you mean velocity. I think I could get very close to 300 RUM performance with a 300 Dakota using RL17 in the Dakota which is too fast burning in the RUM, but I don't think I could surpass it.

Quote:
That was 12 years ago and has proven to be a very accurate and efficient cartridge so I decided I would give it another shot with the 6.5- 284 case. I shortened the case to 1.970 with .320 neck length with enough taper removed so it could not be accidentally loaded into a 6.5 - 284. I kept the 35* shoulder because 35* shoulders work very well. The case holds 54 gr to the base of the neck compared to 50 gr in a 260 Rem. case, 47 gr in a Creedmore case and 44gr in a 6.5 x 47 case. The 6.5 284 case is about a 62 or 63 gr case. All these capacities are water to the neck shoulder junction which is the best comparison of these rounds. I believe the reason that this round will perform as well as the 284 case is because it gets you to a better burn rate in powders (H 4350?) that will fill the case closer to 100% I hope I'm right.
How about shortening the SAUM case (which is already shorter than the 284) vs the 284 case and get some extra capacity?

Quote:
Steve and I worked together to design the step down dies and Steve did the machine work on the dies and rifle and is painting it as I'm writing this. ( Steve has a bunch of sweet shooting guns to his credit by the way.)

The brass is super hard to make so this isn't for the faint of heart to try to do this. We're going to do three guns total since I have made 500 pcs of brass and will not be doing any more if I can help it.

These are fun projects and hopefully this 6.5 will work well !! We will try to get more pictures up soon. -------- 7mm RHB
Good job fellas! I know how hard it is to "shrink" brass. sounds like a niffty little cartridge.
__________________
- Mark

You will never know how much it has cost my generation to preserve your freedom. I hope you make good use of it.
~ John Quincy Adams
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes



All times are GMT -5. The time now is 11:07 PM.


Powered by vBulletin ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Management Powered by vBadvanced CMPS
All content ©2010-2014 Long Range Hunting, LLC