I have been thinking of putting together a package in 7mm rem mag to compete with the hot 26 nosler and 6.5-300. I am hoping to avoid the inherent throat erosion that comes with oushing bullets at these speeds and pressures. What do you think the optimal twist rate would be as well as how would barrel life be? Do you think this would be a better alternative?
Can we beat the 6.5-300 and 26 nosler?
- Thread starter Tomcooper
- Start date
Just go to the 28 Nosler ! RJ
Unless you go with a really long barrel. You won’t be able to make up the increased powder capacity at of the 6.5mm overbores you’ve listed compared to the 7mm rem mag. Buy whatever 6.5 you want as that’s would you are looking for performance wise. In a 600 rounds expect to buy a replacement barrel. Barrels are a wearable part. You can put let’s say 20 lbs of powder down a barrel. Do you want to do it 50 or 80 grains at a time?
Weatherby Fan
CGN Regular
- Location
- Maple Ridge,BC,Canada
If you want a .284 cal to compete with the 26 Nos go 28 Nos, but again if your concerned about barrel life your back to your 7mm Rem Mag, optimal twist rate for a 7mm Rem Mag is 1-9, you can't have it both ways with the choices your asking about, I would take a 280 Ackley over a 7mm Rem Mag but thats me, again if you want to compete in .284 cal with the case capacity of the 26 Nos or 6.5-300 Wby your back to the 28 Nosler
The way I read the OP, sounds like he wants to neck a 7 mag down to 6.5. Interesting.
You should get more velocity than a 6.5 SAUM, but burning a fair bit more powder would probably give you less barrel life. That being said, 7mag brass can be found everywhere. Unlike the SAUM, PRC, RPM etc.
For twist rate, I'd think 1:8 like the PRC.
You should get more velocity than a 6.5 SAUM, but burning a fair bit more powder would probably give you less barrel life. That being said, 7mag brass can be found everywhere. Unlike the SAUM, PRC, RPM etc.
For twist rate, I'd think 1:8 like the PRC.
- Location
- Western Manitoba
Old guy talking. "beat" whatever? And what does that mean? Well documented that Boer shooters were picking off British soldiers at 1,200 yards with M93 Mausers, iron sights and 173 grain RN FMJ bullets (1899-1902 War). Rudyard Kipling mentions in one of his writings about trading shots at 1,400 yards with those Boer shooters. Now build from that. What is it that you want to do better with the 7mm bore? Sweden and Norway got together - late 1800's - to come up with common cartridge to defend themselves - only reasonable threat was from the East - Russia - at the time was all horse drawn supplies - so cartridge design - 6.5x55 - was to be able to disable a horse at range. What is it that you are proposing to "beat"...
Perhaps you are taking about putting little round holes in paper targets? Or making steel gongs "ring" at distance?
Perhaps you are taking about putting little round holes in paper targets? Or making steel gongs "ring" at distance?
I sgoukd ha e explaind this better i didnt want to make it to long i like that the 7mm is common and easily accessible unlike the weatherby and noslers and the idea is to have a deer capable cartridge with minimal elevation adjustment could be a simpler option just wondering if anyone has experemented with anything like this before thanks for the feedback!
How far are you planning on shooting? For "regular" shooting on deer sized game with minimal elevation adjustment you could just go with any number of chamberings and do just fine. You can get out to 325-350 yards point blank range with fast loads out of a .257 Wby, .270 Win, .270 Wby, 7mm RM etc.
You can also use a scope with a good ballistic reticle - I really like Swarovski's BRH reticle. Download the app and you can get close to figuring out the cross-hair to use at a given range (if you measure your velocity). You can then go to the range and practice at various distances to see how your rifle shoots. Using this method you should be easily able to get past 500 yards without touching elevation dials.
You can also use a scope with a good ballistic reticle - I really like Swarovski's BRH reticle. Download the app and you can get close to figuring out the cross-hair to use at a given range (if you measure your velocity). You can then go to the range and practice at various distances to see how your rifle shoots. Using this method you should be easily able to get past 500 yards without touching elevation dials.
From what seems to have been explained the 7mm Rem Mag is already nearly what the OP wants load a decent bullet that excites you and go forth and slay things. Other options as mentioned .270 and the .25-06 and if wildcats or handloading only propositions excite you 6mm-06 and 7mm STW would also shine.
If you want to maximize flatness to MPBR with the 7mm Rem Mag the 110 and 120 monometals may be your best proposition if the possibility of a shot needing some extra penetration is likely. Speer's 130 and Nosler's 120 NBT are both options as well and while a little splashy up close if bone is hit, when placed behind the shoulder of a deer do nothing good for its health.
If you want to maximize flatness to MPBR with the 7mm Rem Mag the 110 and 120 monometals may be your best proposition if the possibility of a shot needing some extra penetration is likely. Speer's 130 and Nosler's 120 NBT are both options as well and while a little splashy up close if bone is hit, when placed behind the shoulder of a deer do nothing good for its health.
One of the gunwriters (Seyfried if memory serves) did a similar exercise some years back, necked a 7mm RM case down to 6mm, blew the shoulder forward and improved it. Called it the 6mm Mach IV for obvious reasons. 28 inch barrel. His goal was light mono bullets at warp speeds, but with the right twist you could use heavier bullets. I built one with a 1-9 twist, but aside from Barnes at the time (mid 80's or so) there weren't bullets that held together well at those velocities. Was an extremely flat shooter though. - dan
Clear as MUD ! BUT you have a 7mm Rem Mag BUT your selling it ??
Your AD on EE -
"Custom 7mm rem mag
Up for grabs i have a custom 7mm reg mag with christensen arms barrel in a greyboe stock asking $2500 message me for pictures "
Your not making sense to me ! RJ
