mistakenly fired 257 robts. in 270 win.

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Ahhh...Headspace strikes again.

I am not at all surprised tthat the 7 mm Mag would fire in a 7 mm STW: They both headspace on the belt. (And, if I recall, once upon a time 30-40 Krag was used for hunting in Canada in Enfields when 303 British was in short supply: Same size head and rim and the bullet was, ummm, close enough).

I am sort of surprised that the primer of the 257 Roberts was punched hard enough by the firing pin of the 270 to go off. However, Swampman's question clears this up. The Mauser Claw of the Ruger held the case head tightly enough to the bolt so that the primer was ignited by the firing pin.
 
My dad also made the mistake of firing a .270 round out of a 7mm Rem mag.....and hit the bullseye he was aiming at when he did so.
 
General ap.hill 47 said:
don't believe all that you read!
Click to expand...
Just kidding!

My personal .257 Bob, an AI version built on a SAKO L579 action, is considerably more accurate than I am unless I'm on a bench with bags and having a great shooting day.

I just thought of another advantage of the Ackley improved Bob!

Judging from my quick attempt to push it into a .270 sizing die, it would take a LOT of force (and maybe a hammer) to force a .257 Roberts Ackley Improved into a .270 Winchester chamber.

It's a health and safety issue!
The imp version is safer than the old Bob!
20170621_131951.jpg

20170621_132027.jpg
 
well i believe the sizing die is a lot tighter than the rifle chamber. out of curiosity try dropping it into the chamber with no pressure, as far as i know the only difference between the std. robts & the ackley is the shoulder angle. please reply if you don't mind :)
 
entropy said:
Glad you weren't hurt. I found not one, but three .308s that were fired in either a .30-06 or .35 Whelen, at the range once:



:eek: And you think you were unobservant!

I fired a .22LR in a .17 Mach4 Savage bolt once-It squeezed down and out the barrel. I was test firing it after working on it, and grabbed .22's out of the testing ammo...:confused:
Click to expand...

30-06 'll do it!

Years ago I was having feeding problems with a .308 garand. Last range trip before a state match, thought I had it worked out and shot a combination practice/sight in session with it a couple of days before the match. Carried a 30-06 garand to get zeroes on just in case the .problem persisted.

Well, it did, just at dusk, the .308 jammed, so I hurriedly dumped all the .308 ammo off my shooting mat and strapped on the '06. Hurried to sight in the '06 from prone in waning light; then, just to check offhand zero, dropped a few 30-06 rounds in shooting jacket pocket and took a few offhand shots at the 200 yard gong. Called the third round good, but hit the berm a foot or so below the gong! Lo and behold, there had been a 308 round in that pocket and the fired case looked exactly like yours. No gas escaped and nothing but my pride was hurt.

Regards,
hps
 
I had a "project" going for a while.

FN 7.92 X 57. Time, no money, money, no time.
You all know how that goes..

The 7.65 Belgian (aka Argentine) looks striking similar.

I sold the ammo I had with the 8mm. Hope I got rid of all of them
as that is the only 8mm I've ever owned.

Unless side be side, hard to tell...... FWIW. Just a little bit longer and the ball ammo
is hard to tell.

I'll be looking REAL hard at what comes out of the 7.65 before I shoot them..
 
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@ General ap.hill 47
:feet: I'm kinda ashamed to admit it, but I don't actually HAVE a .270 at the moment (Jack O'Connor is probably turning over at around 30,000 RPM right about now).

I gave my Santa Barbara action Parker Hale .270 to the 13 year old son of a friend that had sentenced the boy to hunting our 70 pound East Texas whitetails with his grampaws old .300 Winchester Magnum (shooting equally old 180 grain factory ammo, OUCH!)

I did try putting a sized Bob AI case in the .270 seating die and it went in about as far as any case with a .472 inch rim could go.

But the AI version of the Bob does have considerably less case taper and is noticeably wider at the shoulder than a standard Bob. I could see scuff marks around the shoulder where it hit the sides of the .270 sizing die.

To quote Wikipedia:
"The Ackley Improved was a typical change of a steeper shoulder coupled with blown-out sides for more of a straight cartridge, providing greater powder capacity."

I'm on the road and away from home at the moment, but I'll post a pic of the two cases side by side when I get back, assuming I can find a Bob case that I haven't already fire formed.
 
I had been reloading for 20 years and I was exceptionally ( we really need a sarcasm font) confident... I was taking a couple of boys to the range and loaded up the ammo by looking at the bullet; a 250 gr. bullet in a .35 Whelen looks EXACTLY like a 250 gr. bullet in a .358 Norma Magnum (who'da thunk?).

Load, Click! Cycle bolt, look at cartridge... Load, Click! Cycle bolt, look at cartridge (anyone sensing a pattern here?)... Load, ka-BOOOOOM! WHAT THE HECK?????

I now keep that blown case, front & center, at my reloading bench, in order to keep myself humble.

Sam
 
Swampman said:
@ General ap.hill 47
:feet: I'm kinda ashamed to admit it, but I don't actually HAVE a .270 at the moment (Jack O'Connor is probably turning over at around 30,000 RPM right about now).

I gave my Santa Barbara action Parker Hale .270 to the 13 year old son of a friend that had sentenced the boy to hunting our 70 pound East Texas whitetails with his grampaws old .300 Winchester Magnum (shooting equally old 180 grain factory ammo, OUCH!)

I did try putting a sized Bob AI case in the .270 seating die and it went in about as far as any case with a .472 inch rim could go.

But the AI version of the Bob does have considerably less case taper and is noticeably wider at the shoulder than a standard Bob. I could see scuff marks around the shoulder where it hit the sides of the .270 sizing die.

To quote Wikipedia:
"The Ackley Improved was a typical change of a steeper shoulder coupled with blown-out sides for more of a straight cartridge, providing greater powder capacity."

I'm on the road and away from home at the moment, but I'll post a pic of the two cases side by side when I get back, assuming I can find a Bob case that I haven't already fire formed.
Click to expand...
OK.... and take care.
 
SHOOT1SAM said:
I had been reloading for 20 years and I was exceptionally ( we really need a sarcasm font) confident... I was taking a couple of boys to the range and loaded up the ammo by looking at the bullet; a 250 gr. bullet in a .35 Whelen looks EXACTLY like a 250 gr. bullet in a .358 Norma Magnum (who'da thunk?).

Load, Click! Cycle bolt, look at cartridge... Load, Click! Cycle bolt, look at cartridge (anyone sensing a pattern here?)... Load, ka-BOOOOOM! WHAT THE HECK?????

I now keep that blown case, front & center, at my reloading bench, in order to keep myself humble.

Sam
Click to expand...
ohhh! and we must be careful :uhoh:
 
Definitely low pressure not reseating the primer. Seen it a few times messing with some super slow surplus powder. Dont think it would damage anything since it was an undersize bullet.
 
CptnAwesome said:
Glad you weren't hurt. I once did that, I fired a 270 out of a 7 Rem mag... And hit the rock I was aiming at about 50 yds away.

Crazy the way your case stretched out so much
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A friend of mine loaned out his Browning Long Track II in 7mm Rem Mag. The borrower fired a .270 win cartridge in it by mistake and blew the entire fire control group out of the receiver.
 
jimmyraythomason said:
A friend of mine loaned out his Browning Long Track II in 7mm Rem Mag. The borrower fired a .270 win cartridge in it by mistake and blew the entire fire control group out of the receiver.
Click to expand...
Ouch!!! Mine was fired through a TC Encore. Rifle wasn't affected. Had to use a cleaning rod to punch the spent case it though
 
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