257 WBY

[reynolds357]

I discovered a strange phenomenon yesterday on my range. I was shooting my 257 Roy at 200 yds. 85 gr bonded Norma spire points chronoed at 3800 to 3840 at 10 yds. I was shooting A500 plate. I have shot these plates with 300 win mag, 338 lapua, 7 Rum, 264 win mag, and a host of others. This particular plate has been shot with 300 win mag and 264 win mag. I have never shot through these plates with anything not steel core. Well yesterday I thought the 257 Roy was acting anemic. It barely moved the plate. After 3 shots, I walked down to inspect it. 3 shots, 3 clean blow throughs. I would have never in 1000 years dreamed a 85 gr bonded soft point would do that.

 

[Three44s]

Hmm,

I oughta try dat with my 257 STW!

Maybe it will be the military’s mini tank killer?

Perhaps the Norma bullet has some real juice there?

Best regards

Three44s

 

[reynolds357]

I am thinking either the bullet or the velocity is key. 100gr Scirrocco II bullets splatter like 22lr on the same plate. The Norma expands well. I have shot several deer with it and have always had quarter sized exit wounds.

 

[zeke]

Velocity,smaller dia and bullet construction. Although very surprised it would go through AR 500 steel at 500 yards. Shot some plate years ago with 257 wby Barnes bullets at 100 yds, it was like copper inserts in the plate.

 

[LineStretcher]

3000 ft lbs of energy will do that..LOL

 

[std7mag]

I've done the same, but different...
130gr Speer SPBT at 300 yards. But i've found only if target is solid. If it's allowed to swing it won't do it.
Same with 243 Win and 105gr Hornady Match over a charge of RL26 at 200 yards.

 

[dvdcrr]

dang!

 

[reynolds357]

I've done the same, but different...
130gr Speer SPBT at 300 yards. But i've found only if target is solid. If it's allowed to swing it won't do it.
Same with 243 Win and 105gr Hornady Match over a charge of RL26 at 200 yards.

This is a swinger.

 

[bacardisteve]

22-250 is a steel killer as well. It's the velocity that does it.

 

[Scorch]

I've done similar with a 22-250 with 50 gr at 3,900 fps. Looked like someone took a dull drill to 1/2" boiler plate. Bullet energy and small frontal surface area will do that.

 

[reynolds357]

Yeah, velocity penetrates, but still hard to believe it's clean punching something a 300 gr 338 Lapua is barely denting.

 

[Mobuck]

Those soft varmint bullets punch through cold rolled plate like a shaped charge AP projo.
I've seen several instances of a .224 HP bullet punching a clean .30 cal hole through 3/8" plate @ 100 yards and the plate hardly moves from the impact.