F Class OPEN Cartridge

I would lean toward any 6.5 cartridge which would allow me to push 140 grain bullets to around 2800 plus. If I didn't mind recoil, I might build a 30 which would push 200's to about the same velocity level. The important thing is to accept that the wind blows and learn to deal with it. You accomplish this by building a rifle which is consistently accurate and easy to shoot accurately then shooting it a lot. If you have a shot blown out, know why.
A 6BR, using 115's, will get blown around a little more but it will be very easy to shoot. A 6.5 Creedmoor is fine although one might want to cover up the barrel markings so no one knows what you are shooting. Likewise, the 260, 6.5x55, 6.5x6mmRem, and the 6.5-284 are all viable cartridges. I have a 7.62x57 barrel (just a 308 run in an extra 6mm) which I have not worked with yet and which is not enough to satisfy those who wasnt to try and outrun the wind but which I hope will enable me to go fast enough without taking too much abuse. Otherwise, there are a few 300's which would fill the bill.
In the end, the only important thing is having a rifle which shoots as close to zero vertical as possible. I can then work at dealing with the wind.
 
remington jim said:
YUP looking at them NOW for a New build hows that 338 short Sherman shooting Buddy ? RJ
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Been fun with all the testing, getting some throating done now and trying a new bullet next. Swapped stocks and scope too so it’s going through some changes. I’m using ADG brass and have some proper headstamped to get fireformed next. Guy in Alberta now has one too, shooting a 230 eldx over 2900. His buddy used it to shoot an elk, one shot, at 834 yards.

Bighorn sales carries 6.5 and 7 saum ADG brass, simple load and fireform to the Sherman MAX series Sherman short. Can even shoot factory saum out of it. Best suited on a mid length action or long action, the SST and SS are fine on a short action.
 
remington jim said:
7 Saum is also a Good Cartridge - Some do use it and also the 6.5 Saum - :d RJ
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I went with the 7saum for the simple reason that you can push the highest BC bullet that Berger produces at the highest speed that would be legal for said bullet at Connaught range in Ottawa. If I ever get to compete at a provincial level, I won’t have to mess with my current load to be below the speed limit there. Don’t be afraid to launch some heavy bullets. With a 22lb weight limit on your rifle, you won’t feel a lot of recoil. I’m pushing 195 eols at about 2800 fps. It is a joy to shoot.
 
There is a triangle of factors to be considered for an F-Open cartridge. One leg is a high BC bullet. another is high enough velocity, the last is recoil. When these are balanced, you get a good cartridge choice. Most shooters I know use a 284 of some form as it will shoot decent BC bullets fairly fast with acceptable recoil. Barrel life is also a huge issue. A 284 lasts about 2000 rounds, a 7mm Saum lasts at 1200 rounds and a 300 WSm is about 2000 rounds.

The 300 WSM has a very limited following strictly do to recoil. Most shooters cannot shoot these well and have abandoned them. The 7mm Saum has a limited following due to barrel life and past brass availibity.

However the high BC heavy 6.5's are coming on because they will shoot inside a 7mm in most conditions and the recoil is a lot less.

When you look at the big f-Class matches the 284's rule.
 
ruby76 said:
Sooner or later guys in Canada will see the benefits os the Sherman short lineup (SAUM based), either SST, SS, or MAX. 6mm, 6.5, 7mm, 300, 338.
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Aren't the Shermans a bit of a farce? Don't you need to push the pressures far above 65k psi to get the ballistics they claim as possible?
 
Steve is correct and why reinvent the wheel, borrow a 284 and shoot it at a match

but I understand the need to reinvent the wheel




SteveB said:
There is a triangle of factors to be considered for an F-Open cartridge. One leg is a high BC bullet. another is high enough velocity, the last is recoil. When these are balanced, you get a good cartridge choice. Most shooters I know use a 284 of some form as it will shoot decent BC bullets fairly fast with acceptable recoil. Barrel life is also a huge issue. A 284 lasts about 2000 rounds, a 7mm Saum lasts at 1200 rounds and a 300 WSm is about 2000 rounds.

The 300 WSM has a very limited following strictly do to recoil. Most shooters cannot shoot these well and have abandoned them. The 7mm Saum has a limited following due to barrel life and past brass availibity.

However the high BC heavy 6.5's are coming on because they will shoot inside a 7mm in most conditions and the recoil is a lot less.

When you look at the big f-Class matches the 284's rule.
Click to expand...
 
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