NEW cartridge !!! - Page 3
You are Unregistered, please register to use all of the features of FirearmsTalk.com!    
Firearm & Gun Forum - FireArmsTalk.com > Long Guns > General Rifle Discussion > NEW cartridge !!!

View Poll Results: What diameter bullet do you think I should neck 375 ruger case down to first?
.243 5 8.77%
.25 1 1.75%
6.5mm 18 31.58%
.277 (270) 3 5.26%
.284 (7mm) 17 29.82%
.30 5 8.77%
.32 1 1.75%
.338 9 15.79%
Multiple Choice Poll. Voters: 57. You may not vote on this poll

Reply
 
LinkBack Thread Tools Display Modes
Old 02-24-2009, 10:44 AM   #21
Feedback Score: 0 reviews
 
stalkingbear's Avatar
 
Join Date: Sep 2007
Location: Lebanon,Ky
Posts: 3,631
Liked 15 Times on 13 Posts
Likes Given: 3

Default

I'm using a 26" Krieger barrel on an Browning A-bolt action. The water capacity is 98 grains. That's a small bit more than for .375 H&H, but will fit in any .270/30-06 length action. It's mostly a long range toy and beanfield rifle. I honestly feel it fills a niche. I've have now gotten over 3,400 fps but not by much. And YES, it's an HONEST 3,400 fps. It's weird as the bullet "goes to sleep" between 100 and 200 yards. It gets the EXACT same size group at 200 yards as it does 100 yards. I'm using 140 grain Nosler Ballistic Tips with 1-10 twist. The scope is of 4x-16x-42mm flavor with plain ol duplex. Since deer season is long over with modern firearms, I'm just waiting for the local yote pack to show up before dark. What else do you want to know? Oh yeah, RCBS wanted 400$ for forming/loading dies but I used rougher reamer to ream my own dies from .338, .300,and 7mm rem mag used dies.
stalkingbear is offline  
 
Reply With Quote
Old 03-02-2009, 12:17 AM   #22
Feedback Score: 0 reviews
 
dukech1's Avatar
 
Join Date: Mar 2009
Posts: 249
Default

Sounds interesting, maybe VERY fast. What powders have you looked at?
dukech1 is offline  
 
Reply With Quote
Old 03-02-2009, 06:29 PM   #23
Feedback Score: 0 reviews
 
Gatekeeper's Avatar
 
Join Date: Mar 2009
Location: Uniontown,PA
Posts: 3,710
Liked 8 Times on 6 Posts

Default

Hey everyone, Im new to this forum, lots of good info here. I found it while doing a search for 7mm-375 ruger wildcats.
Stalkinbear, I currently have a Rem Mod700 7STW that I had rechambered from 7 RemMag years ago when it was still a wildcat.
I have been think about rebarrelling to a faster twist to be able to use the 180VLD's for long range target/hunting. The problem is I would have to seat bullets so deep in STW cases I would lose powder capacity, so since Im losing capacity I thought about going back to RemMag so I could seat bullets longer but don't really want to stay with the belted case.
I thought about 280AI but the velocity loss is a little more than I care to accept.(STW got me spoiled). I looked at Dakotas but cases are expensive, only available from Dakota...so here I am
The 7mm-375 Ruger looks like it may fit my needs perfectly. My question is what is involved in forming cases. With my STW it was simply a matter of running 8mags thru the stw dies. I figure it will take a more steps necking down to .284 from .375.
If you dont mind what is your case prep procedure?
Are there any problems with cases buckling or necks getting too thick?
Sorry long winded I know, but thanks for the info, and congrats on your project!----Ken
Gatekeeper is offline  
 
Reply With Quote
Old 03-03-2009, 10:37 AM   #24
Feedback Score: 0 reviews
 
stalkingbear's Avatar
 
Join Date: Sep 2007
Location: Lebanon,Ky
Posts: 3,631
Liked 15 Times on 13 Posts
Likes Given: 3

Default

The forming is fairly straight forward. All you have to do is set shoulder back .100 and neck down .091. To do this I used rougher reamer for my cartridge, and neck down to .338 (and set shoulder back), then to .300, then to 7mm mag dies, then trim to length. With my max loads, I'm getting basically 7mm RUM velocity in an cartridge that functions through 30-06 length actions. Naturally I outside neck turn all my cases in the name of uniformity & accuracy. I've only had experience with 140 gr Nosler Ballistic Tips thus far as it was originally intended as something for long range plinking, and perhaps as an beanfield gun. It's getting 1/2" groups at 200 yards so far, and I think that's pretty darn good personally. I've used H870, IMR4831, and Retumbo so far, will try more powders as weather & wallet permits. Thanks for your interest! Neil
stalkingbear is offline  
 
Reply With Quote
Old 03-04-2009, 04:47 AM   #25
Feedback Score: 0 reviews
 
Gatekeeper's Avatar
 
Join Date: Mar 2009
Location: Uniontown,PA
Posts: 3,710
Liked 8 Times on 6 Posts

Default

Thank you for the info, and congrats on a great project.
By the way, have you named your cartridge yet?
Gatekeeper is offline  
 
Reply With Quote
Old 08-08-2010, 09:50 PM   #26
Feedback Score: 0 reviews
 
Join Date: Aug 2010
Posts: 1
Default

i am new on this site,interested in 7mm 375 ruger browning build by stalkingbear
i am a browning nut too lol
Scott
gunnut7mm is offline  
 
Reply With Quote
Old 08-08-2010, 10:55 PM   #27
Feedback Score: 0 reviews
 
hunter Joe's Avatar
 
Join Date: Feb 2008
Posts: 2,413
Liked 1 Times on 1 Posts

Default

Hey gn7mm even though this is an ancient thread I like to welcome you to the forum and urge you to stop by the "Introduction Section" tell us a little about yourself.

I'm sure you will find many 7mm enthusiasts on the Rile forum.

Good Luck, Joe
__________________
God, Family, Guns, in that order.
hunter Joe is offline  
 
Reply With Quote
Old 08-10-2010, 07:26 PM   #28
Feedback Score: 0 reviews
 
Josey Wales '94's Avatar
 
Join Date: Jan 2010
Posts: 172
Default

Well since this has been "re-discovered" I would like to have any update on this cartridge, too.
Josey Wales '94 is offline  
 
Reply With Quote
Old 08-10-2010, 08:35 PM   #29
Feedback Score: 0 reviews
 
JonathanGlass's Avatar
 
Join Date: Jul 2010
Posts: 45
Default

.243, get a little more speed on it and a couple hundred ke on it, i'll be buying that round then
__________________
aim small, miss small
JonathanGlass is offline  
 
Reply With Quote
Old 08-11-2010, 01:57 AM   #30
Feedback Score: 0 reviews
 
stalkingbear's Avatar
 
Join Date: Sep 2007
Location: Lebanon,Ky
Posts: 3,631
Liked 15 Times on 13 Posts
Likes Given: 3

Default

Thanks for the interest. Between needing money badly, and an offer far beyond what I had in it, I sold the rifle with the forming/reloading dies. I still have the reamers and am planning on another build. I was losing cases from "firewalling" (HOT loads) after only a few loadings. To get 3,400 fps with a 140 gr bullet, my loads had to be too hot for what I consider safe. I'm going to work on slightly milder loads with a longer barrel and s l o w powder. Also the 140 Ballistic Tips acted like a miniature grenade when they hit. I'm going with a faster twist this time too. Hopefully I'll have my new rifle done by this winter. It's all a learning curve. I'm confident I'll like the new rifle's performance better for LONG range shooting/hunting than the last 1.
__________________
Sometimes you earthlings REALLY amaze me!
stalkingbear is offline  
 
Reply With Quote
Reply

Thread Tools
Display Modes


Similar Threads
Thread Thread Starter Firearms Forum Replies Last Post
Preferred deer cartridge Uncle Tom Hunting Forum 69 04-12-2010 12:26 PM
new cartridge maybe cpttango30 General Rifle Discussion 2 07-30-2008 04:17 PM
Any Cartridge Collectors out there? Bob Wright Revolver Handguns 4 06-28-2008 01:54 AM
.300 winchester magnum cartridge JHendrix Hunting Forum 2 08-02-2007 12:06 AM
240 lswc 44 mag cartridge weight fantasy Ammunition & Reloading 1 07-03-2007 12:50 PM



Newest Threads