RockyMtnMT
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Looking for opinions. I had Dan Lilja build a 30" barrel for my Sako 75 in 30-378. Dennis Olson is doing the smithing for me. My question is should I stay w/ 30-378 or change to 300 rum?
300 rum vs 30-378
- Thread starter RockyMtnMT
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Others smarter than me will chime in on the accuracy potential of the two which I think might lean towards the 300 rum. I did put the two on quickload and thought maybe with a 30" barrel the 30-378 might outrun the 300 rum by a fair margin but I only came up with about 50fps diff at 64k pressure.
Considering the price of 30-378 brass and it's reputation for being soft, the potential for a little faster barrel burnout, I think the practical side might go away from the 30-378.
Considering the price of 30-378 brass and it's reputation for being soft, the potential for a little faster barrel burnout, I think the practical side might go away from the 30-378.
Jon A
Well-Known Member
I'd stay 30-378. If starting from scratch I think the 300 RUM is a good choice, but since the rifle is already set up with the big bolt face, feed rails to feed the big round, etc, I don't think you'd be gaining anything worth the effort of converting.
RockyMtnMT
Official LRH Sponsor
Thanks for the info. I'll talk w/ the gun smith today and make a decision. I'll post again on how the project goes. So you all know, in short, I'm planning to shoot gs custom bullets' hv 173 grn and hoping to get as close as I can to 3800 ft/sec. Should be fun.
Fiftydriver
Official LRH Sponsor
Steve,
Of the two rounds, I like the RUM better then the 30-378 but as mentioned already, since your receiver is set up for the larger bolt face it would not be a good idea to try to step back to the smaller RUM rim diameter.
That said, a round I would recommend far over the 30-378 is something like my 300 Allen Xpress which is based on the 338 Lapua case. Same head diameter basically as the Wby but case strenght is castly superior to the Norma made Wby case you would be able to basically match the 30-378 in performance with less powder capacity because of the rounds ability to handle higher chamber pressures.
Any 30 cal based on the Lapua will come very close to matching the 30-378 and the improved versions like my 300 AX will run with it head to head.
Plus you can load the Lapua up to nearly 70,000 psi and not have a problem. If you do that with the Wby case, you will get one firing per case and the primer pockets will be loose.
Brass cost is similiar with the Lapua being slightly less if you buy in bulk.
The Improved versions of the 30-338 Lapua will basically split the powder capacity between the RUM and 30-378.
It would also feed in your Sako just fine as well.
Kirby Allen(50)
Of the two rounds, I like the RUM better then the 30-378 but as mentioned already, since your receiver is set up for the larger bolt face it would not be a good idea to try to step back to the smaller RUM rim diameter.
That said, a round I would recommend far over the 30-378 is something like my 300 Allen Xpress which is based on the 338 Lapua case. Same head diameter basically as the Wby but case strenght is castly superior to the Norma made Wby case you would be able to basically match the 30-378 in performance with less powder capacity because of the rounds ability to handle higher chamber pressures.
Any 30 cal based on the Lapua will come very close to matching the 30-378 and the improved versions like my 300 AX will run with it head to head.
Plus you can load the Lapua up to nearly 70,000 psi and not have a problem. If you do that with the Wby case, you will get one firing per case and the primer pockets will be loose.
Brass cost is similiar with the Lapua being slightly less if you buy in bulk.
The Improved versions of the 30-338 Lapua will basically split the powder capacity between the RUM and 30-378.
It would also feed in your Sako just fine as well.
Kirby Allen(50)
RockyMtnMT
Official LRH Sponsor
That sounds like what I am after. I have had problems with the primer pockets expanding previously. That is why I thought I might be able to match the 30-378 with the 300rum. It appears that I should have no problem with the 300 AX. How do I get dies for the 300 AX? Will my gun smith Dennis Olson have any trouble chambering for this caliber?
Thank you, Steve
Thank you, Steve
C
Chawlston
Guest
[ QUOTE ]
Thanks for the info. I'll talk w/ the gun smith today and make a decision. I'll post again on how the project goes. So you all know, in short, I'm planning to shoot gs custom bullets' hv 173 grn and hoping to get as close as I can to 3800 ft/sec. Should be fun.
[/ QUOTE ]
Steve,
I have several hundred of the 173gr HVs if you are interested.
James
Thanks for the info. I'll talk w/ the gun smith today and make a decision. I'll post again on how the project goes. So you all know, in short, I'm planning to shoot gs custom bullets' hv 173 grn and hoping to get as close as I can to 3800 ft/sec. Should be fun.
[/ QUOTE ]
Steve,
I have several hundred of the 173gr HVs if you are interested.
James
RockyMtnMT
Official LRH Sponsor
James,
I am interested. I have not shot any yet, would be interested in maybe 50. Did you not have success w/ them? What were you shooting them out of?
Steve
I am interested. I have not shot any yet, would be interested in maybe 50. Did you not have success w/ them? What were you shooting them out of?
Steve
RockyMtnMT
Official LRH Sponsor
What do you think of a 30-416 rigby. Appears that the bolt face and magazine will work fine. Powder capacities will stay the same or slightly greater than the 30-378 in a non belted cartrige, eliminating the inherent preasure problems. Any feed back on this would be appreciated.
Thank you, Steve
Thank you, Steve
[ QUOTE ]
What do you think of a 30-416 rigby. Appears that the bolt face and magazine will work fine. Powder capacities will stay the same or slightly greater than the 30-378 in a non belted cartrige, eliminating the inherent preasure problems. Any feed back on this would be appreciated.
Thank you, Steve
[/ QUOTE ]
I am not Kirby, but I do not believe that brass quality or strenght of the Rigby case would be much if any upgrade from the Wheatherby case and niether will be as strong or as consistent as the Laupa case in my opion ........
What do you think of a 30-416 rigby. Appears that the bolt face and magazine will work fine. Powder capacities will stay the same or slightly greater than the 30-378 in a non belted cartrige, eliminating the inherent preasure problems. Any feed back on this would be appreciated.
Thank you, Steve
[/ QUOTE ]
I am not Kirby, but I do not believe that brass quality or strenght of the Rigby case would be much if any upgrade from the Wheatherby case and niether will be as strong or as consistent as the Laupa case in my opion ........
Fiftydriver
Official LRH Sponsor
I would agree, if you want a 30-416 you would be better off with the 30-378 wby. Both cases will be limited by case strength with high pressure loads and forming the 416 to 30 cal can be a pain. The 30-378 and 338-378 pretty much made the 30-416 and 338-416 obsolete.
I would still prefer the Lapua case over either of these for case head strength.
Kirby Allen(50)
I would still prefer the Lapua case over either of these for case head strength.
Kirby Allen(50)
RockyMtnMT
Official LRH Sponsor
Thank you. Is the 416 rigby brass less durable than 300rum? Is 338 lapua brass easier to size to 30-338 lapua improved? Sorry for all the questions.
Thank you, Steve
Thank you, Steve
reed mosser
Well-Known Member
- Joined
- Sep 16, 2003
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- 347
Its very easy to neck down 338 laupa to 30 cal. One step. The 30-338 laupa is also a pretty user friendly cartidge.
demarpaint
Well-Known Member
Another vote for the 30-338 Lapua. I am launching a 210 SMK a little under 3,300 fps, using US869 Powder.
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