Originally Posted by BGbasbhat
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
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