Really didn't want to share.

[ndking1126]

Pretty odd, the 7x300 does have an extra 4" of barrel, but still odd. Maybe I should try the 162's

I dont have time right now, but I may throw these numbers in a calculator. We could back into the velocity difference pretty easily. What elevation are you?

 

[Old Rooster]

Thanks for sharing.
We as reloaders are mostly responsible people but as all humans do we do make mistakes.
I have made them on the loading bench but caught it before I was done.Haven't made mistakes on the bench YET but I am getting older every day.
I overloaded 4 rounds of 300 weatherby mag a few years ago but when finished putting bullets in I then weigh all newly loaded rounds I just reloaded on a digital scale just to make sure and caught the overloads.
I have been reloading since 1967 and still make mistakes and that's why I leave the scale plugged in until I have weighed all rounds.
P S I have caught underloads too
Old Rooster

 

[Muddyboots]

On bench when guy next to me did identical error. Shooting 7RM and 300WM that had identical color ammo boxes. He set the 7 aside to cool and grabbed the 300. When he shot, I asked him what was that load. He said it sounded light and so did I. He reached for another round when I heard some interesting language. He caught it by seeing the bullet diameter being wrong and proceeded to express some colorful OMG words of wisdom. I told him he just made some 300AI but he didn't see the humor. Never hit target at 200 but big enough backstop. He now color codes the ammo boxes with 7 yellow and the 300 red. he doesn't even take both rifles out of his truck at range!

Many years ago I broke rule of 2 powders on bench. As I pulled a load, I promptly pored the recovered powder into wrong container. Recognized immediately and got Instant fertilizer. If I did that today with scarcity of powder, probably removing rest of hair.

 

[venatic]

I know someone that shot a whole box of 300 Win Mag thru a 300 UltraMag and didn't notice until he asked for help to zero the rifle....made some unusual looking brass

 

[nmbarta]

I dont have time right now, but I may throw these numbers in a calculator. We could back into the velocity difference pretty easily. What elevation are you?

3500

 

[rlspahn]

It really doesn't make sense.
The 7x300 shoots 175 eldx at 3120 now.
The 162 in the rem is just over 3000.
How did that only hit 2moa low? I was shooting at a rock, so I don't know exactly how close the shots were to each other, but I know I'd be happy if I could always keep them that close. Pretty odd, the 7x300 does have an extra 4" of barrel, but still odd. Maybe I should try the 162's

Your rifle wasn't zero'd for the 7 Rem Mag ammo. Its POI at 100 yards (or whatever your normal sight-in distance is) is likely higher than the correct ammo, and accounts for a part of the difference. I don't suggest you confirm this, however.

 

[ThrdKllr]

Many years ago I did a similar thing, but shot a 270 round through a 7 Mag. luckily I was wearing glasses, which saved my eyes. It did though do considerable damage to the rifle which was a Browning BAR.

My dad did the same exact thing firing a 270 Winchester in a 7mmRM BAR. Luckily he wasn't hurt but it made a mess of the BAR. Bullet went through the target side ways.

 

[Wedgy]

Thanks for sharing and glad everything is OK
I was doing load development for a buddies 7RM I rebarreled and found this case I suppose they shot it in a 300 WM The WM left, 7 RM center, "fire formed" case on the right

 

[hangfire]

Just look on this as a reminder, no matter how good we are we can still make mistakes

 

[BPollard]

Wow nmbarta you really are being hard on yourself!! Mistakes are mistakes and oftentimes are avoidable, however that's what they are "mistakes" and not intentional actions. When I hear people call themselves stupid, I ask them how they would like it if I called them stupid because there's really not difference. Anyway...........I did something quite similar as your mistake, something that I am, and was not to happy to have done. I was shooting five-stand with my Remington 1100 20 gauge with a bunch of friends. I was using an ammo bag to hold for my ammo and to hold my hulls. One of the guys who I was shooting with had a Remington 1100 in 12 gauge. While we were shooting the course I was talking with this guy about his 12 gauge 1100 and how it shot and recoil. After we had shot the course he asked me if I would like to try shooting a few rounds with his gun, and I said yes. He gave me a couple of rounds to shoot, I put them into my range bag, set my shotgun in the rack, all this time we were BSing and I was not really paying attention to business. I took his gun, reached into m range back, pulled out a round and threw the round into the chamber, BSed some more, called pull. I raised the gun up and "CLICK", so "Oh" I must have forgotten to put a round in the chamber so I reach into the range bag, pulled out another shotgun shell, put it into the chamber making sure there was a round inside of the gun this time. At this point I was getting ready to say pull when one of the other, more experienced shooters, told me to hold up and to check the barrel of the shotgun, which I did. I still thank Frank for paying attention because there was a very nice 20 gauge shotgun shell lodged inside of the barrel. Apparently there was still a 20 gauge round inside of that range bag and when I reached into the bag to get one of the 12 gauge rounds I pulled that 20 gauge shell out first. Had I pulled that trigger it would have been catastrophic for everyone on that shooting field. Had I been paying attention instead of BSing I would have realized when the gun went "click" that there was something seriously wrong or I would have caught it when I heard the round fall down the barrel!! When something like this happens it can be a blessing in disguise because it gives us a real "wake-up" call and keeps us on our toes. Sometimes after shooting for many years we become callous. Right now as I am writing this reply my butt cheeks slammed together and everything between them slammed up tight!! Thanks for sharing this with the group, by doing so you probably helped people to pay more attention and prevented something serious from happening to them!!

Sometimes we make mistakes. I recently made some 300 Weatherby brass 340 wby. I got to get my eyes checked.

 

[Chas1]

+1 for sharing. We all make mistakes and those that say they don't are mistaken. My cardinal rule is one gun with it's ammo goes on the bench and off the bench before next one goes on. Just me.

 

[VTbluegrass]

Whoever reamed it out and didn't stamp the barrel also deserves a swift kick in the pants

 

[GCamalo]

NMBarta, glad that you are ok. Main thing is no one was hurt. And props to you for sharing your experience with everyone, because it takes a strong person to do that. I guarantee that your story will keep at least one person who read it from doing it themselves. Stay safe!

 

[Gater]

I was shooting a service rifle match when one of the other shooters was using an M-1 Grand during the 600 prone the first shot didn't sound right the second shot blew the gun up. Broke the top heat guard cracked the stock just before the grip a left-handed shooter would have had the stock jammed in to their cheek. Needless to say the gun was trashed don't know what caused it just lucky no one was hurt