Long Range Hunting Online Magazine


Go Back   Long Range Hunting Online Magazine > Hunting > The Basics, Starting Out


Reply

Custom hunting .30-378

 
LinkBack Thread Tools Display Modes
  #1  
Old 02-05-2009, 09:39 PM
Junior Member
 
Join Date: Feb 2009
Posts: 16
Custom hunting .30-378

Alright, I'm somewhat of a newbie; but I've been trying to read everything I can get my hands on....So, I sincerely appreciate any and all your guys' knowledge. But, I need some help...PLEASE!!!

My dad and I are going to AK next year for a grizzly hunt. So, being that my .30-30 wont do, I need a little more boom.

I like the versatility of the .30 cals; but I didn't want something that everybody and their brother has. (RUMs and WinMags). So I arrived at the .30-378, and kinda liked the Mark V action. Don't worry, I thought about the .33s; but I wouldn't be able to use it for anything smaller than elk.

Anyway, now I'm reading that the Mark V action might not be the best for accurizing and gunsmith work. Further, most of you guys aren't fans of the freebore anyway.

I would like to stick with the caliber; but I'm not set on a Weatherby gun, and I'm not at all opposed to doing a semi-custom or something of the sort...Especially since I was already saving for the $1600 Accumark!!! BTW, 99% of the time, I will be using this rifle for hunting. Later on down the road, if I get into benching, then so be it..But western hunting is my focus for now.

So here goes:

1. Would you recommend a better action for the .30-378? I've read that you can't really build them off Rem700s, so what would be preferred from a gunsmith's perspective? What would be most tuneable? I know Sako makes a production rifle in that caliber, so would this out of the box rifle be better? Is there an out-of-the-box rifle that would be better than the Accumark in that caliber, and be easily accurized?

2. I've seen some of you guys have put new tubes on your .30-378s. Since freebore doesn't seem to be conducive to accuracy (up for debate, I know..), do these new barrels have less or no freebore? If so, do you guys decrease your loads due to the increased pressure?

I think that's all for now. I'm completely obsessing about this, and I want to have ample time to be 100% comfortable with my abilities and gun for the hunt.

I look forward to your knowledge, and thanks again.
Reply With Quote
  #2  
Old 02-05-2009, 09:54 PM
Platinum Member
 
Join Date: Feb 2007
Location: Townsend, Montana.
Posts: 7,822
Re: Custom hunting .30-378

Hello BGbasbhat and Welcome,

My .338 Lapua is built off a Mark V action. So I don't see the problem, I shot antelope at 800 and a WT doe at 1137 this year.

I have two 30-378's both have the freebore. One is an accumark, the other has a 30" custom barrel. I have shot the custom with freebore to 1000 yards and held 1 moa easy.

As for the Sako, I am not sure about the free bore on it. But I would bet it has it. That way you can use the factory Wby shel ammo with out pressure concerns.

I am not saying I am a fan of freebore. I am simply stating my real experiences with the above.

PS. I just put a very nice accumark 300 WBY in the classifieds.

Jeff
.
__________________
Reply With Quote
  #3  
Old 02-05-2009, 11:35 PM
Platinum Member
 
Join Date: Jul 2004
Location: Texas
Posts: 5,446
Re: Custom hunting .30-378

Quote:
Originally Posted by BGbasbhat View Post
Alright, I'm somewhat of a newbie; but I've been trying to read everything I can get my hands on....So, I sincerely appreciate any and all your guys' knowledge. But, I need some help...PLEASE!!!

My dad and I are going to AK next year for a grizzly hunt. So, being that my .30-30 wont do, I need a little more boom.

I like the versatility of the .30 cals; but I didn't want something that everybody and their brother has. (RUMs and WinMags). So I arrived at the .30-378, and kinda liked the Mark V action. Don't worry, I thought about the .33s; but I wouldn't be able to use it for anything smaller than elk.

Anyway, now I'm reading that the Mark V action might not be the best for accurizing and gunsmith work. Further, most of you guys aren't fans of the freebore anyway.

I would like to stick with the caliber; but I'm not set on a Weatherby gun, and I'm not at all opposed to doing a semi-custom or something of the sort...Especially since I was already saving for the $1600 Accumark!!! BTW, 99% of the time, I will be using this rifle for hunting. Later on down the road, if I get into benching, then so be it..But western hunting is my focus for now.

So here goes:

1. Would you recommend a better action for the .30-378? I've read that you can't really build them off Rem700s, so what would be preferred from a gunsmith's perspective? What would be most tuneable? I know Sako makes a production rifle in that caliber, so would this out of the box rifle be better? Is there an out-of-the-box rifle that would be better than the Accumark in that caliber, and be easily accurized?

2. I've seen some of you guys have put new tubes on your .30-378s. Since freebore doesn't seem to be conducive to accuracy (up for debate, I know..), do these new barrels have less or no freebore? If so, do you guys decrease your loads due to the increased pressure?

I think that's all for now. I'm completely obsessing about this, and I want to have ample time to be 100% comfortable with my abilities and gun for the hunt.

I look forward to your knowledge, and thanks again.
First of all I think the Weatherby Mark 5 is one of the strongest actions made. !!!!

A while back White laboratories tested all of the commercial actions to destruction (Blew
them up) and the only action that they couldn't blow up was the MK 5. (when I find
this test results report I will post it).

Next the accuracy issue. The type of action has very little to do with accuracy if it is
installed with minium tolerances and precision.

And as far as freebore it does not hurt accuracy if the chamber is concentric and head
space is .001 or less. also it allows hotter loads (Higher velocity) with less pressure.

If you take a Weatherby factory load and try to use it in a non throated 30/378 it will
probably blow the primer because it will be to hot forcing you to load down losing velocity.

I have a 30/378 built on a # 7 taper shillen target select with a standard throat that will/
has shot a .092 (less than 1/10 of an inch) 5 shot group and is built on a Weatherby Mark
5 action using a 200gr nozzler partition .

Also I once had (wish I still did) an accumark in 30/378 that would shoot 1/4 MOA groups
(.174,.198 and .219 with different loads) so the rifle more than exceeded Weatherbys
specs.

As far as I'm concerned It is the only fractory action that is suitable and strong enough
for the 30/378.

The Mk 5 actions are well machined,stronge and have good triggers, plus they look good.

A custom action would be the only other option for the big 30/378.

Just my 2 cents based on lots of experience with Mark 5 actions.

J E CUSTOM
__________________
"PRESS ON"

Last edited by J E Custom; 02-06-2009 at 08:30 AM.
Reply With Quote
  #4  
Old 02-06-2009, 09:06 PM
Platinum Member
 
Join Date: Feb 2005
Location: USA
Posts: 2,598
Re: Custom hunting .30-378

The 30-378 can most assuredly be built on a Rem-700 action and are.
__________________
range it,check the wind, dial in correction, aim and only one shot
Reply With Quote
  #5  
Old 02-06-2009, 10:49 PM
Bronze Member
 
Join Date: Jan 2007
Location: SW Oregon
Posts: 69
Re: Custom hunting .30-378

I shoot a 30-378 in a accumark. After a re-bed and re-crown job the accumark shoots very well (under 1/2 moa), freebore doesn't seem to be an issue.
Reply With Quote
  #6  
Old 02-06-2009, 11:56 PM
Platinum Member
 
Join Date: Mar 2002
Location: Wyoming
Posts: 2,615
Re: Custom hunting .30-378

I second what JE said. Yes you can put a 378 case on a rem 700 action, it is just not very smart. The 700 action is not nearly enough for this powerful cartridge. Don't try to blow yourself up.
__________________
Predictions are difficult, especially when they involve the future
Reply With Quote
  #7  
Old 02-07-2009, 11:53 AM
Junior Member
 
Join Date: Feb 2009
Posts: 16
Re: Custom hunting .30-378

Thanks for all the replies fellas. You all confirmed my thoughts about the action.
Considering the base of the .378 is only .03 in larger than a .300 RUM, I wouldn't doubt that it could fit on a 700. But, like you said LTLR, I wouldn't want to push the limit of an action. I'd rather have an action that is fully strong enough to do it.
I posted up a couple topics on some other sites (and searching for others) regarding the Mark V, Accumark, Weatherby, etc.... It seems some people talk bad about the freebore, and how you wont be able to hit squat with it. But as I've derived from you guys and others, there's no point in having a Weatherby cartridge of such high velocity/pressure without freebore. And you guys are obviously shooting some tack drivers!! I'm going to continue to read more about freebore and why people have this theory. Any idea?

Next question: Since I will be using the rifle mainly for hunting, do you think a Fibermark would be a better choice? The Fibermark is pillar bedded and a decent crown, and would save me 1lb....and is $400 less.

Thanks again, and I look forward to your replies
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes


Similar Threads for: Custom hunting .30-378
Thread Thread Starter Forum Replies Last Post
Custom 30-06 Hunting Rifle spf long450 Guns For Sale 1 02-14-2011 11:05 PM
WTB Custom Built Hunting Rifles ready05 Guns For Sale 9 11-03-2010 02:20 PM
Custom Hunting Rifle MSU Marksman Equipment Discussions 11 05-24-2008 06:47 PM
Custom Hunting Clothing?? Troutslayer General Discussion 3 08-09-2005 04:41 PM
Custom .270 Hunting rifle former naval person Guns For Sale 4 12-17-2003 03:44 PM

Current Poll
Do you archery hunt for elk?
YES - 32.40%
81 Votes
NO - 50.80%
127 Votes
Not yet, but I plan to. - 16.80%
42 Votes
Total Votes: 250
You may not vote on this poll.

All times are GMT -5. The time now is 04:00 AM.


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