What do you need all that velocity for??????? I had a 300RUM and loaded it with 95grs of Retumbo. Yea I got my 3,200 out of it. Shot a Black bear at 100yds thru shoulder.Entered his left shoulder,blew out his right.Hanging from one paw from tree shot him again broke his back still hanging shot again this time he did a endo in the air falling 100'. My point eve n with all that speed still took three shots with a bunch of distroyed meat.
How does it profit a man if he gains the whole world but loses his soul?
I would just really like a rifle with a custom barrel and have the receiver accurized. It would be my first. I also want to go a little bigger in case size so I could if needed shoot the heavier 240g SMK. However, I'm wondering if I need to go bigger then what I already have. I cant exactly out shoot my 300 RUM yet. It still has plenty of power out to 1000 yards. I would like to have the cartridge be 1500 yard or 1 mile target accuracy/capability while being able to hammer something at 1000 yards. The 7 tomahawk with the 176g is gettin me thinking a little bit. The brass seems to be the biggest part. If you guys were gettin 1.7 10 shot groups at 500 yards, I'd say thats not to bad. Really good. I would be happy with that for 3 shots. I am hoping to at least keep 3 shots in a paper plate at 1000 yards with no or little wind. I have told a couple local gunsmiths my plan, and they say its not really attainable with a hunting rifle because of all the variables.
I would say that it is possiable with a hunting weight rifle.My 300 win has a medium sporter weight barrel and I have shot 1" groups with it at 300 yards and I shot a group at 550 that went 3.875" with 2 touching and 3 into 1.75" My barrel is about.625 at the muzzle and is 28..875" long. A slightly larger diameter barrel would be advised on a 300 RUM,Tomahawk,etc.
range it,check the wind, dial in correction, aim and only one shot
For all purposes a 5 inch group at 500 yards will suffice and is more than accurate enough to take game at 500 yards.
A standard 300 rum loaded with 190~240 Berger and SMK will suffice in a 28 inch barrel.
Bob Lingenfelter designed it with some help from Ray Romain and you can only get the Dies for the 300 tommy through Ray or possibly Bob. They have the rights to the dies through Redding.
Theres not much difference between the 300 tommy and the 300 rum until you get into 30~34 inch and longer barrels then you can start to see what a few more grains will net you.
Either one you pick will do what you need it to do. If you go to the 300 tommy then youll need to fire form which will subtract from your overall barrel life. If you can get your hands on a used 308 barrel and chamber it for the 300 tommy and fire off 100 or so rounds then switch to the real barrel youll save a lot of life.
Although this info is not using the RUM case, it's an example of side by side comparison with ammo from the same box in two barrels. I have a 26" Savage which used to be a Swift; although I reamed it before firing it with a carbide .220 Extremist. The other was cut with the same reamer in a 30" PacNor. The case now uses about 48 grains behind Nolser's 55 Balistic tips. The 26" Savage averages 4,006 feet per second and the 30" PacNor averages 4,300 fps! If you want max speed, go long.
The more I think about it, the more I should just go with what I have, 300 RUM. I cant exactly outshoot it, so I really dont need bigger. I would like to keep the rifle down to around 11 lbs w/bipod. I would like to have a 28" barrel w/brake this time to spot my own shots. Maybe 3300fps is attainable with 200g bullets. It still looks like the 7mm AM would kick the 300 RUM's butt ballistically. Just dont know If I can really afford the extra money for dies/brass setup. I will already have to purchase a leica 1200 or swaro when I have this rifle built, so there is another $600. I will be sending my Rem 700 LSS off to Kirby, have him accurize and put a 28" Lilja with/holland brake. I want to have a little heavier contour then the factory, but I would like to continue using the laminated stock. So maybe sanding the channel might work. If not, I would eventually like to put a Mcmillan A-5. I would like to get a Jewell trigger, or something that allows down to 1.5lbs or so, with the safety still being able to work. Hopefully, the gun will shoot 200g AB's accurately for hunting. I would use the 200g or 220g SMK for targets/practice. I want to at least be able to keep 3 shots on paper plate at 1000 yards. So I should be able to hit big game size critter, depending on the variables. I would really like to see 6-8 inch groups at 1000 yards with a developed load. I would be putting a Leupold MK4 4.5-14x50 LR in the Leupold PRW rings and bases. I will have the rifle built by next elk season, I just dont know exactly when. Hopefully real soon.