Thread: Keeping the 7mm ahead of the 30 cal?

If they can get that speed out of them - I'll build/buy a 7mm RUM - that 325 and 25 only cals I dont own under 338.. must be about time for a 7mm

Originally Posted by Spanners

If they can get that speed out of them - I'll build/buy a 7mm RUM - that 325 and 25 only cals I dont own under 338.. must be about time for a 7mm

And a 257 Roberts

They will be nice for the 7mm guys, F class etc if you can cope with the recoil & lack of barrel life

IF they get the BC they are looking for & they will stand up to the twist rate required without the jackets getting to thick, they will be good for hunting.

But in a Rum etc they will only be a whisker in front of a .338 300 Hybrid that will have 3-5 times the barrel life & the 300 will be miles easier to keep accurate over its life & will kill better

A 7mm rum should give you 3000-3100 depending on barrel length
The 7mm lapua imp 3200-3300 but dont expect the barrel to last to long.

Originally Posted by Terminator

A 7mm rum should give you 3000-3100 depending on barrel length
The 7mm lapua imp 3200-3300 but dont expect the barrel to last to long.

I second that on the barrel life, I ran my RUM at 3471fps with the 180 Bergers in a 30 inch tube with a Gabe Zigliani suppressor and barrel life was woeful, I used a short throat and after 100 rounds of hunting and target shooting my OAL grew to keep a just touch. 200 rounds down the tube and I had to start slowing it down to 3400fps to keep accuracy, then to 3330 to keep it accurate, then the accuracy just went.

I pushed the RUM hard as I wanted something for 1500 to 2000yrd practise.I'd say the barrel would still be alright if I had been more conservative.
All the practise confirmed one thing, a first round lethal hit on a deer past 1450yrds in a no wind situation is unlikely for me with a 7mm projectile.
A VERY stiff load in the saum pushes the 180 berger at 3000fps, I dont know what it would push the 195 at.
As a hunting projectile im not sure if the 195 would be an improvement over the A-max in a saum.
Hard to knock the 162 a-max off its perch for a hunting projectile when comparing like with like at saum speeds.

And KiwiGreg has 5 very valid points here....
"IF they get the BC they are looking for & they will stand up to the twist rate required without the jackets getting to thick, they will be good for hunting.

But in a Rum etc they will only be a whisker in front of a .338 300 Hybrid that will have 3-5 times the barrel life & the 300 will be miles easier to keep accurate over its life & will kill better"

Very hard to stay with the 7mm when shooting out past 1000-1500yrds........

Originally Posted by 7mmsaum

I second that on the barrel life, I ran my RUM at 3471fps with the 180 Bergers in a 30 inch tube with a Gabe Zigliani suppressor and barrel life was woeful, I used a short throat and after 100 rounds of hunting and target shooting my OAL grew to keep a just touch. 200 rounds down the tube and I had to start slowing it down to 3400fps to keep accuracy, then to 3330 to keep it accurate, then the accuracy just went.

I pushed the RUM hard as I wanted something for 1500 to 2000yrd practise.I'd say the barrel would still be alright if I had been more conservative.
All the practise confirmed one thing, a first round lethal hit on a deer past 1450yrds in a no wind situation is unlikely for me with a 7mm projectile.
A VERY stiff load in the saum pushes the 180 berger at 3000fps, I dont know what it would push the 195 at.
As a hunting projectile im not sure if the 195 would be an improvement over the A-max in a saum.
Hard to knock the 162 a-max off its perch for a hunting projectile when comparing like with like at saum speeds.

And KiwiGreg has 5 very valid points here....
"IF they get the BC they are looking for & they will stand up to the twist rate required without the jackets getting to thick, they will be good for hunting.

But in a Rum etc they will only be a whisker in front of a .338 300 Hybrid that will have 3-5 times the barrel life & the 300 will be miles easier to keep accurate over its life & will kill better"

Very hard to stay with the 7mm when shooting out past 1000-1500yrds........

that seams stupidly hot? for that speed?

what do you run in the rum now?

anyone know when they are coming out? tho i still use the a-max over the 168 an 180 bergers now anyway but mite be worth a try

Originally Posted by tui_man2

that seams stupidly hot? for that speed?

what do you run in the rum now?

anyone know when they are coming out? tho i still use the a-max over the 168 an 180 bergers now anyway but mite be worth a try

I just necked the RUM up to 338 and put a 300g Gen 2 Hybrid in it. Same velocity as Burtonators one. Far better killing power.

Steve tried to talk sense into me years ago about the Edge but I wouldnt listen, and I should have.

Originally Posted by Wildman

And a 257 Roberts

Now there is a calibre worth talking about.....................

That would be a 7-08 for you kaftan wearers from the big smoke!

Originally Posted by Spanners

If they can get that speed out of them - I'll build/buy a 7mm RUM - that 325 and 25 only cals I dont own under 338.. must be about time for a 7mm

Dont worry about us hillbillies downsouth but looks like another lr gong shoot coming up down our ways so you better get your work dates sorted so you can come play