David Emerson
Well-Known Member
Go for it. The barrel makers will be inviting you to their family picnics.
7-378 Weatherby, Long Range 7mm
- Thread starter weatherbee
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Deleted member 8840
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Not once did I say that anything I have done was better than anything or anyone. The guy ask about 7mm 378 weatherby and I answered. One thing for sure there will always be someone a little bigger and better. For some the hard part is excepting that fact.
David Emerson
Well-Known Member
I was not responding to you. You make sense. I was responding to another that likes maximum speed with no other consideration.
shorthair1
Well-Known Member
Why not use the parent round for the .378 wby the old .416 rigby necked to 7mm and do away with the belt ?
shorthair1
Well-Known Member
If you do one with a .505 Gibbs parent they may name their grand kids after you.
That is a lot powder down a small hole. I suspect barrel life would be affected
RockyMtnMT
Official LRH Sponsor
There is nothing wrong with "barrel burners". Treat them right and use them for hunting not plinking and you can hand them down to you grandkid so that he can hunt with it for another 25 years.
Trick is having the parent case that can handle it and enough barrel to make it perform. I think guys see no return for the extra overbore thinking it will be run on a 26" barrel. That would be correct. Run a 30-32" barrel and watch it shine. The 338 Lapua case is the only one that makes sense to me to handle the task. As stated earlier the 7mm Allen Mag has more than proven that a 7mm 160g class pill at 3600 fps is powerful medicine to very long range, and can do it for much longer than the 300 rounds the nay sayers are reporting.
To the OP: Don't let the barrel burner crowd talk you out of building a long range fire breathing hunting rifle. If you really want it on the Wby parent case it will work. Just won't be able to match the capability of the Lapua case.
Fast accurate guns are more than interesting...They are fun!
Trick is having the parent case that can handle it and enough barrel to make it perform. I think guys see no return for the extra overbore thinking it will be run on a 26" barrel. That would be correct. Run a 30-32" barrel and watch it shine. The 338 Lapua case is the only one that makes sense to me to handle the task. As stated earlier the 7mm Allen Mag has more than proven that a 7mm 160g class pill at 3600 fps is powerful medicine to very long range, and can do it for much longer than the 300 rounds the nay sayers are reporting.
To the OP: Don't let the barrel burner crowd talk you out of building a long range fire breathing hunting rifle. If you really want it on the Wby parent case it will work. Just won't be able to match the capability of the Lapua case.
Fast accurate guns are more than interesting...They are fun!
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Deleted member 8840
Guest
Far left 338 lapua
Middle 7mm Rouge (7mm 378 AL)
Right 338 Excalibur ( 416 Rigby case)
You can decide what is best. I will say one thing the 7mm lapua will not out perform the 7mm Rouge.
Middle 7mm Rouge (7mm 378 AL)
Right 338 Excalibur ( 416 Rigby case)
You can decide what is best. I will say one thing the 7mm lapua will not out perform the 7mm Rouge.
RockyMtnMT
Official LRH Sponsor
Got any 7mm-416 Rigby imp numbers?
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Deleted member 8840
Guest
No You came go to the 300 Pegasus and see the numbers on it. I shot the 338 excalibur but have not entertained the thought of necking it down to 7mm. The 7mm rouge would be to close to mess with it and I have the reamers.
RockyMtnMT
Official LRH Sponsor
I know the 30-416 Rigby imp was hot in the 1000y bench rest years ago, but was pushed out by the 30-378 Wby. Awful lot of brass prep to get the 416 necked down and improved. It is longer but not sure it can handle the kind of pressure that the Lapua case can.
adam32
Well-Known Member
A 7mm/338 Excalibur should be right at 138gr capacity versus the 7mm/378 Wby at 130gr.
For comparison, the Lazzeroni Firebird (biggest commercial 7mm) is 126gr.
7mm/338 Lapua improved, 120gr.
Not improved, 113gr.
7mm RUM, 112gr.
28 Nosler, 99gr...basically the same as the STW and the 7mm/300 Wby.
RockyMtnMT
Official LRH Sponsor
We have played with the 300 Norma imp and necked it up and down. It will produce about rum performance with about 10g less powder and a shorter oal. The Lapua imp will produce about 200 fsp over the rum depending on the reamer. Yet still a bit shorter oal than the rum. The Lapua imp is pretty tough to beat until you go to a Cheytac parent case. Whole diff world.
