What's wrong with 270 WSM?

[Lou270]

The weight of the powder charge is minimal addition to recoil. It is bullet weight, velocity and rifle weight that matters. You increase velocity by 15 to 25 percent, you increase recoil period. Most people despite all the talk just cannot handle recoil.


The formula for recoil velocity is \(V=-mvM\), where \(v\) is the bullet velocity and \(M\) is the mass of the gun. The negative sign indicates that the gun moves in the opposite direction of the bullet.

There is no free lunch. Push up velocity you push up recoil.

According to load data 6.5 prc gets about 3000 fps give or take with ~60 gr of powder out of a 24” barrel. The 277 sig fury gets 3000 fps with 140 out of 16” barrel out of a 16” barrel using basically a 308 win case. Load data shows a max charge around 48 gr in a 308 case with 175gr (same sec density as 140 .270. According to jbm in 7 lbs rifle that is 22.3 ft-lbs of recoil for 6.5 prc and 18.9 ft-lbs for the 277 Fury. Of course if you use a longer barrel, 277 sig fury will likely be 3200 fps but that is not the point. In a 16” barrel the 6.5 prc would probably be 2800 fps and 20.6 ft-lbs so still more recoil unless the jbm calc is wrong

Lou

 

[SwiftShot]

According to load data 6.5 prc gets about 3000 fps give or take with ~60 gr of powder out of a 24” barrel. The 277 sig fury gets 3000 fps with 140 out of 16” barrel out of a 16” barrel using basically a 308 win case. Load data shows a max charge around 48 gr in a 308 case with 175gr (same sec density as 140 .270. According to jbm in 7 lbs rifle that is 22.3 ft-lbs of recoil for 6.5 prc and 18.9 ft-lbs for the 277 Fury. Of course if you use a longer barrel, 277 sig fury will likely be 3200 fps but that is not the point. In a 16” barrel the 6.5 prc would probably be 2800 fps and 20.6 ft-lbs so still more recoil unless the jbm calc is wrong

I am confused are reading something wrong. Are you saying both rifles weighing the same pushing the same bullet weight at the same or speed. One has less recoil based solely on a difference of 12 grains of powder? I am ready your saying the less recoil one is even pushing faster speeds. If so that is some Harry Potter stuff.

 

[Lou270]

I am confused are reading something wrong. Are you saying both rifles weighing the same pushing the same bullet weight at the same or speed. One has less recoil based solely on a difference of 12 grains of powder? I am ready your saying the less recoil one is even pushing faster speeds. If so that is some Harry Potter stuff.

I am not saying it. The recoil calculator on jbm ballistics is saying it. Run it yourself if you think I did something wrong.

Lou

 

[Bluefish]

I am confused are reading something wrong. Are you saying both rifles weighing the same pushing the same bullet weight at the same or speed. One has less recoil based solely on a difference of 12 grains of powder? I am ready your saying the less recoil one is even pushing faster speeds. If so that is some Harry Potter stuff.

Powder weight is included in the recoil calculation so more powder adds recoil. If the calculation is correct it’s more than you think. Thus the sig with less powder and more pressure for the same speed has less recoil. Or it could have more speed and less recoil.

 

[MarkOrtiz]

For me it just doesn't do anything better than other cartridges on the market, no ammo availability, and the reloading components are harder to find with better options out there.

If I want to shot lighter bullets I would go 6.5 PRC or 270 win (I have a 270 win) and the availability of everything is there. If I want to shoot heavier bullets, than 6.8 Western, 7SAW, 7wsm, 7PRC, and 7SAUM seem like a better choice.

 

[180ls1]

Slammer deal at $430 for one if anyone is looking.

BROWNING SAU A-Bolt 3ʺ 270 WSM BRN-MIR0KU Blem/Refurbished Blemished | KYGUNCO

KYGUNCO is your one-stop online shop with the lowest prices for firearms, ammunition, accessories, parts, and outdoor essentials. We ship fast and easy around the country from our home locations in Kentucky, and are always ready to help.

www.kygunco.com

 

[KenLee]

Slammer deal at $430 for one if anyone is looking.

BROWNING SAU A-Bolt 3ʺ 270 WSM BRN-MIR0KU Blem/Refurbished Blemished | KYGUNCO

KYGUNCO is your one-stop online shop with the lowest prices for firearms, ammunition, accessories, parts, and outdoor essentials. We ship fast and easy around the country from our home locations in Kentucky, and are always ready to help.

www.kygunco.com

Looks like a picture of an x-bolt, not an a-bolt 3.