Long Range Hunting Online Magazine


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


Reply

.277 Ruger wildcat

 
LinkBack Thread Tools Display Modes
  #1  
Old 02-25-2012, 11:41 PM
Silver Member
 
Join Date: Sep 2010
Location: So. California
Posts: 408
.277 Ruger wildcat

Hello LRH,

I have been wanting / needing to re-barrel my Savage 111 currently chambered in 6.5x55 BJAI. I have just not been able to make up my mind until Berger Bullets about broke my arm with their announcement of the 170 gr. .277 EOL hunting hybrids!

I got to playing with JBM checking out the 7mm Vs. the .277, then added in 6.5, 6, and even .30. Long story short, for a hunting / range rifle that 170 gr. .277 bullet is very convincing! Recoil should be reasonable given the bullet weight.

Ok so: 375 Ruger - parent case

-- Case Length of Approximately 2.41
-- Neck Length of Approximately .36
-- Shoulder Angle of 30*

Now, I do not have the 170 gr. bullet diagram or bullet measurements So take the above with a grain or so... The intent is to allow 3.340 C.O.A.L using a .277" 170 gr. Berger Hybrid EOL seated so that the boat tail is protruding somewhat into the shoulder area of the case, but the beginning of the bullet shank will be just ahead of the neck / shoulder junction so as to avoid Doughnut problems.

Playing with JBM, *IF* I can get an honest 2850 fps. out of this combination it should carry 2000 fps and 1500 ft.lbs. out to 700 yards. That is a pretty good Thump!

I went with the Ruger Mag case because I like the non rebated, clean design of it.

Thoughts and opinions?
Gary
Reply With Quote
  #2  
Old 02-26-2012, 01:00 AM
Platinum Member
 
Join Date: Nov 2008
Location: SW Montana
Posts: 4,257
Re: .277 Ruger wildcat

Your selling yourself way short on velocity!!!!! I run the 175 Matrix at 3014fps in my WSM and the Ruger case has more engine room.
__________________
High Fence, Low Fence, Stuck in the Fence, if I can Tag it and Eat it, it's Hunting!
"Pain is weakness leaving your body"
Reply With Quote
  #3  
Old 02-26-2012, 02:58 AM
Platinum Member
 
Join Date: Mar 2005
Location: Utah
Posts: 1,377
Re: .277 Ruger wildcat

Quote:
Originally Posted by bigngreen View Post
Your selling yourself way short on velocity!!!!! I run the 175 Matrix at 3014fps in my WSM and the Ruger case has more engine room.
I agree. The case will easily push the 189's to 3000 in the 7mm version.

I think it'd be a hammer. Barrel life would be a bit skimpy for my taste. I wouldn't count on seeing the new 270's anytime soon iether.
Reply With Quote
  #4  
Old 02-26-2012, 06:23 AM
Platinum Member
 
Join Date: Dec 2005
Location: Tucson Az
Posts: 1,096
Re: .277 Ruger wildcat

I believe you will end up with a very short neck if you simply neck down the 375 Ruger. I discussed this with a tech at Hornady regarding a 7mm version. The 270 would have similar issues. This is why
Gunwerks made their 7 LRM version which moves the shoulder creating a longer neck. Otherwise this should be an interesting build with great downrange performance.
Reply With Quote
  #5  
Old 02-26-2012, 04:57 PM
Silver Member
 
Join Date: May 2011
Posts: 169
Re: .277 Ruger wildcat

Quote:
Originally Posted by diriel View Post
Hello LRH,

I have been wanting / needing to re-barrel my Savage 111 currently chambered in 6.5x55 BJAI. I have just not been able to make up my mind until Berger Bullets about broke my arm with their announcement of the 170 gr. .277 EOL hunting hybrids!

I got to playing with JBM checking out the 7mm Vs. the .277, then added in 6.5, 6, and even .30. Long story short, for a hunting / range rifle that 170 gr. .277 bullet is very convincing! Recoil should be reasonable given the bullet weight.

Ok so: 375 Ruger - parent case

-- Case Length of Approximately 2.41
-- Neck Length of Approximately .36
-- Shoulder Angle of 30*

Now, I do not have the 170 gr. bullet diagram or bullet measurements So take the above with a grain or so... The intent is to allow 3.340 C.O.A.L using a .277" 170 gr. Berger Hybrid EOL seated so that the boat tail is protruding somewhat into the shoulder area of the case, but the beginning of the bullet shank will be just ahead of the neck / shoulder junction so as to avoid Doughnut problems.

Playing with JBM, *IF* I can get an honest 2850 fps. out of this combination it should carry 2000 fps and 1500 ft.lbs. out to 700 yards. That is a pretty good Thump!

I went with the Ruger Mag case because I like the non rebated, clean design of it.

Thoughts and opinions?
Gary
If 2000 fps and 1500 ftlbs at 700 is all you're looking for look at the 30-375 Ruger with the 185, 190, 200, 210, or 230 Berger will get you there. Example:

230gr Berger Hyb @2600 fps @ 700 yards = 1930 fps and 1902 Ft lbs.

For less recoil:

185gr Berger @ 3100 fps @ 700 yards = 2118 fps and 1842 ft lbs

Now both of those combos would be much more of a "Thump" at 700 yards. Just a thought.....
Reply With Quote
  #6  
Old 02-26-2012, 05:41 PM
Silver Member
 
Join Date: Feb 2009
Posts: 165
Re: .277 Ruger wildcat

I am looking forward to see the .277 170 berger also I am currently using 169.5 wildcats & have some 165 matrix also both have great bc's I am sure the 170 bergers will be comparable. I think your 2000 fps &1500 lbs would be closer @ 1000 I am @ 2046 fps & 1571 lbs @ 1000 with a 7mm dakota parent case necked down 70grains of retumbo 169.5 wildcat
make sure you go with a 9 twist or slightly faster with the 170 grainers
I think berger announced April of this year was there goal we'll see?
Reply With Quote
  #7  
Old 02-26-2012, 06:43 PM
Silver Member
 
Join Date: Sep 2010
Location: So. California
Posts: 408
Re: .277 Ruger wildcat

I had not thought about the Matrix bullets, thank you for bringing that up. Anyone have any measurements on a 165 / 175 Matrix .277?

As for the modest FPS and Ft.Lbs I was really just "worst case" thinking so I could compare things in JBM and still have numbers that would push me one way or the other.

I had a 300WM for several years and shot the 208 / 210s out of it. I like to shoot a fair bit, and by about the 40 to 50 rounds down range mark those 200gr.+ pills were beginning to take a toll. I would like to have just a tad bit less recoil. I have considered a brake, and that idea is still very much on the table.

All in all it seems like with these new super bullets the .277 cal. really has a nice overall balance to offer up for shooters. Not saying it is magic snake oil.. It would be Really Nice to retain 2000 Fps and 1000 Ft.Lbs + out to 1k or just a bit farther. The remaining energy seems easily there, just the Fps to ensure proper bullet expansion etc.

Fun with numbers... *IF* I maintain my 3.340" COAL limitation then the base of the 1.52" bullet would be at 1.82" from the head of the case. Ouch Conversely the .270 WSM neck / shoulder junction is located at 1.824, and the actual shoulder / case body junction at 1.664. Now the listed OAL is only 2.860 Vs. a standard LA of 3.340. So, if I take 1.82 as the base of the bullet, then add in the length of the boat tail, I get the location of the Bullet Shank / Neck Shoulder Junction. From there I can decide on how much Neck Length I want, and come up with a OAL Brass Length. For kicks, the 270 Win has a neck length of .384.

-- So, 1.82" + Approximately .23"-ish boat tail length = 2.05" Neck / shoulder junction.
-- 2.05" + .384" = 2.434" OAL brass length.
The problem at the moment is I have too many assumptions and not enough hard numbers bullet wise.

It would be nice to be able to load to COAL and have a 170 gr. Hybrid about .015 off the lands and not worry about possible doughnut problems I know that is being kinda lazy... but the main focus is Hunting .. ;) Less Problems by design = a good thing.

Now for a more esoteric consideration. Does anyone know for sure what the throat leade angle on the old M96 Swede's were? I Think it is .5*, but am having a hard time pinning that down. I love how my original M96 was so easy to tune loads for. I figure those Swede's must have known something when they chose the setup they did.

The extra case capacity should give a bit of a velocity boost which will be nice. I have 24 Lbs. of H1000 sitting here waiting for a Party to Go-To Most important to me is an over all elegant design that just happens to be a Hammer!

Thoughts and Information are more than welcome,
Gary
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes


Similar Threads for: .277 Ruger wildcat
Thread Thread Starter Forum Replies Last Post
338/375 Ruger or 375 Ruger with high BC bullets? AZShooter Rifles, Bullets, Barrels and Ballistics 14 09-13-2013 05:14 AM
New #1 Ruger Stainless varminter in 204 Ruger 450 marlin Rifles, Bullets, Barrels and Ballistics 13 02-19-2013 08:33 PM
RUGER HAWKEYE AFRICAN in375 Ruger krummarine Guns For Sale 0 12-30-2007 09:16 AM
Ruger bedding pillars , for Ruger 77MK-II James Jones Equipment Discussions 1 11-26-2006 12:59 AM
250 Gr. Wildcat(.338) traks44 Rifles, Bullets, Barrels and Ballistics 16 04-27-2006 10:21 AM

Current Poll
Where in the US do you live?
West of the Mississippi River - 59.94%
772 Votes
East of the Mississippi River - 37.73%
486 Votes
On the Mississippi River on a houseboat - 2.33%
30 Votes
Total Votes: 1,288
You may not vote on this poll.

All times are GMT -5. The time now is 03:12 PM.


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