Have you ever wondered what would happen if...

quigley257

quigley257

Well-Known Member
Joined
Oct 8, 2014
Messages
1,797
Location
Rapid City, South Dakota
...someone accidentally fired a 300 Win Mag in a 7 RUM chambered rifle? Wonder no more! Customer brought their rifle in after firing a 300 WM out of a 7mm RUM. The rifle survived. The bullet exited the barrel. Customer states that the bullet hit the target(I find this incredible in and of itself). The barrel will be scrapped. It came out of the receiver with a bit of effort. The recoil lug is stuck on the barrel tenon. The bolt had to be beat open with a mallet. QC department checked over the bolt and receiver and have cleared them for future duty as they pass muster with go/no-go thread gages. No noticeable bolt setback. Bolt will be lapped to receiver and await customers instructions for rebarrelling.

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20240919_173934.jpg
 
I accidentally proved that a 280 AI will fire nicely in a 7 RM a couple of years ago. Of course, that had no real consequences except one fireformed to 7 RM piece of expensive Nosler 280 AI brass.

Scary how this can happen -- I am not a lazy haphazard shooter. Could be the owner of the 7 RUM was an idiot, but probably not.

Moral of the story from me -- don't get cute with hot rifle barrels and try to alternate guns with all your ammo laying around on the bench. Several no-nos in one there. It was hot and I decided I could work on break-in and keep barrels cool by alternating guns.. Ughhh....

Sometimes near misses (terminology from industrial safety teaching and not shooting) are not punished. Sometimes they are......
 
Citified said:
This kind of stuff makes me nervous. I have many rifles of similar calibers and am extremely careful not to get them mixed up.
Every now and then you see an article like this. I am amazed it didn't blow up the action itself. Really proof tested that one.
Very lucky man
Click to expand...

Years ago I learned (should've known better) the hard way……do not have my ammo and my wife's ammo on the bench at the same time.

Firing one of her cartridges in my rifle actually gave the exact opposite of this topic……extremely low pressure! That mistake caused me to…..freak-out as my chronograph to "come from untogether", felt much less recoil than anticipated, throw away a .338 WM brass that instantly became a "straight wall" case.

No harm to me or my rifle……but my "feeling were hurt"!

Lesson learned……never place more than one cartridge type on the bench at a time! memtb
 

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