Long Range Hunting Online Magazine


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

Rifles, Bullets, Barrels & Ballistics Applied Ballistics


Reply

input on 6mm something or other coyote rig build

 
LinkBack Thread Tools Display Modes
  #29  
Old 12-25-2012, 11:57 AM
Platinum Member
 
Join Date: Jun 2010
Location: greenwood, IN
Posts: 3,628
Re: input on 6mm something or other coyote rig build

Quote:
Originally Posted by T3-OleMan View Post
Got me and the G.D. (71 & 3.5yrs. which ever needs it first- never fired yet) a WallyWorld $399 youth Rem 700 .243Win and a bunch of all the factory loads and noticed:

-in their gun:
A) 58gr Hornady Superformance V Max 3,925 fps
B) 80gr Barnes TTSX BT 3,350 fps

That is woofing it & I bet it will leave a mark. I may never have to reload any, but I got the stuff!

Good luck with your choice.
you'll probably end up with quite a lot of bullet jump to get to the lands with that 58 grain bullet. I was able to get almost 3500fps out of the standard 6mm Remington using a Sierra 80 grain bullet and cases made from a very old lot of .257 brass (they hold almost two grains more powder). The accuracey load with that same bullet and powder ended up being about 3440 fps with the bullet very close to the lands. I recommend the Sierra 80 grain Blitz
gary
Reply With Quote
  #30  
Old 12-26-2012, 01:43 AM
Silver Member
 
Join Date: Jul 2005
Location: sw ks
Posts: 314
Re: input on 6mm something or other coyote rig build

Quote:
Originally Posted by Lefty7mmstw View Post
The biggest problem with 25 cal is the bullets(especially 100 gr and below) are stubby and soft for the 250 savage. I've got a 25 wssm, and it's a hell of a rifle but it takes a 120 bt to get the bc up enough for longer range.
I'm looking at rebarreling a striker, so I'm going to stay with a .473 bolt face so I could put the original barrel on with little tinkering.
Yeah I hope berger brings out a heavyweight 25. Never has been a decent slug in 25 or 27 or 32 and all sorts of cool things we could do with them. An 8mm 275gr .85 bc is a nice thought.
The 25 was just nnever a LR caliber because of bullets. Maybe now that the 270 is fixed the 257 roy will have a real reason to exist besides being a short range screamer.
Reply With Quote
  #31  
Old 12-26-2012, 10:08 AM
Platinum Member
 
Join Date: Feb 2010
Location: Gillette, WY
Posts: 2,706
Re: input on 6mm something or other coyote rig build

Quote:
Originally Posted by Trickymissfit View Post
... I recommend the Sierra 80 grain Blitz
gary

The 80grn Blitz is a great bullet isn't it? One of my all time favorites right there. I first started loading that in my 243AI at the recommendations of Robert T. of Sierra fame. It doesn't have a fancy ballistic tip or super cool name, it just plain works.


t
__________________
"I, however, view ethics as an individual decision. My ethics are mine - and I won't explain or justify them to anyone else. I seek nobody's approval, just that of my own conscience. "

Reply With Quote
  #32  
Old 12-26-2012, 12:47 PM
Platinum Member
 
Join Date: Mar 2008
Location: SW Idaho
Posts: 1,162
Re: input on 6mm something or other coyote rig build

It's a lot of fun playing with burner cartridges so I don't want to talk you out of that if that is what you are looking for but I would encourage you to compare ballistics on the differences between a fast 87 grainer doing 3700 or so (reaching that is possible but not easy) and the 105-115 grainers going 3-3300 fps (which is pretty easily attainable.

You will get flatter trajectory out to the distances you mentioned but you will pay for it in a lot more powder being burnt, much less barrel life and you will sacrifice wind drift and possibly accuracy. To my way of thinking elevation is easily accounted for with a good ballistic chart, turrets or a good ballistic reticle. But wind drift is a different story. No matter how big you go I would suggest you look at the heavy for caliber bullets.

I do think there is a point of diminishing returns for each caliber and I think we pass it with the 6mm by going to the 6-284 and bigger. Maybe that isn't a big issue to you but with my smaller caliber guns I go through a lot more ammo than my bigger guns.

I think you would be hard pressed to go wrong with the following:

6x47, 6mm Creedmore, or the 6XC. You should easily get 3000 fps with the XC and another 200+ with the others. There is great brass available for all of them and they all have shown to be very accurate and easy to load for. The XC is based off the 22-250 case so you could use your current stock of cases for it as well but there would be some forming involved.

Sounds like a fun project. Good luck in your decision!

Scot E.
Reply With Quote
  #33  
Old 12-26-2012, 02:09 PM
Platinum Member
 
Join Date: Jun 2010
Location: greenwood, IN
Posts: 3,628
Re: input on 6mm something or other coyote rig build

Quote:
Originally Posted by Outlaw6.0 View Post
The 80grn Blitz is a great bullet isn't it? One of my all time favorites right there. I first started loading that in my 243AI at the recommendations of Robert T. of Sierra fame. It doesn't have a fancy ballistic tip or super cool name, it just plain works.


t
a good shoulder it on a 30lb coyote will often cut them in half at 250 yards. Have not shot them much in my 6/250AI, but they should do just fine.
gary
Reply With Quote
  #34  
Old 12-26-2012, 02:10 PM
Silver Member
 
Join Date: Apr 2008
Posts: 185
Re: input on 6mm something or other coyote rig build

Go to 6mmAR.com and check out the 6mmSLR as it is a cross between the 6XC & the .243 Win . You get the longer neck and 30 degree shoulders plus you'll have the option to run the 115 grn. pills and it is quite accurate and easy to load for just run the 243 Win brass through the die and you are done load and shoot.
Reply With Quote
  #35  
Old 12-26-2012, 02:21 PM
Platinum Member
 
Join Date: Jun 2010
Location: greenwood, IN
Posts: 3,628
Re: input on 6mm something or other coyote rig build

Quote:
Originally Posted by Scot E View Post
It's a lot of fun playing with burner cartridges so I don't want to talk you out of that if that is what you are looking for but I would encourage you to compare ballistics on the differences between a fast 87 grainer doing 3700 or so (reaching that is possible but not easy) and the 105-115 grainers going 3-3300 fps (which is pretty easily attainable.

You will get flatter trajectory out to the distances you mentioned but you will pay for it in a lot more powder being burnt, much less barrel life and you will sacrifice wind drift and possibly accuracy. To my way of thinking elevation is easily accounted for with a good ballistic chart, turrets or a good ballistic reticle. But wind drift is a different story. No matter how big you go I would suggest you look at the heavy for caliber bullets.

I do think there is a point of diminishing returns for each caliber and I think we pass it with the 6mm by going to the 6-284 and bigger. Maybe that isn't a big issue to you but with my smaller caliber guns I go through a lot more ammo than my bigger guns.

I think you would be hard pressed to go wrong with the following:

6x47, 6mm Creedmore, or the 6XC. You should easily get 3000 fps with the XC and another 200+ with the others. There is great brass available for all of them and they all have shown to be very accurate and easy to load for. The XC is based off the 22-250 case so you could use your current stock of cases for it as well but there would be some forming involved.

Sounds like a fun project. Good luck in your decision!

Scot E.
The 6/250AI I shoot uses .243 brass cut down. I do this for case shrinkage alone, and I still see .04" in the necks. The 6xc is easier to do, and that's pretty much what I fire form off of. I end up with 1.885" over all lengths, and really want to address this problem this comming year with a longer necked reamer of some sort. I'd like to do the .35" full neck length of the 6mm Ackley, but with the shorter shoulder length of the 250AI. That way I think I'll come out with a neck length of about .32". This will seriously increase the throat life, and make it easier to handle light weight bullets at the sametime.

I see about 3000 fps with the 105 grain Amax and the Sierra 107's at near max loads.
gary
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes



All times are GMT -5. The time now is 07:50 PM.


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