Boy am I an idiot

[Butte Sink]

I think I maybe very lucky, making a huge mistake.

In a rush to finish all items and get out prior to an Elk hunt, I rushed myself to load what was needed for this hunt.
I had been working a load prior for this hunt with my 300 RUM using a Berger 210 VLD, 91gr Retumbo, 215 GM and Nolser case.
When Working up this load I used my prior CBTO from a 200 Accubond which is 3.138.
I did numerous seating test and thought I came up with a real good load at .040 off the land / 3.098 matter of fact it shoots REAL good, running at roughly 3080fps.
Well it just now dawned on me what I did so I just check my CBTO with a Berger and that is touching the lands at 3.059 IDIOT!

So with that I was actually jamming the land at roughly .039

I made these load up in Oct / Nov and shot them at roughly sea level and a temp in the mid 50 and then shot them again in Colorado at 8000’ and a temp in the low 20’s, no issues at all

Question I have is what negative issues could you see happening from this?
I have heard that for hunting load you really should be a minimum .010 off the land to allow for any dust etc that may enter your chamber.

Let me get your thoughts

Much appreciated!

 

[Old Navy]

It is a long time til next season. Target practice with them and start over again this summer.

 

[Plumsask]

What about a bullet that is jammed .040 being exttracted if not fired and dumping powder with a bullet stuck in the beginning of the rifling?

 

[Butte Sink]

What about a bullet that is jammed .040 being attracted if not fired and dumping powder with a bullet stuck in the beginning of the rifling?

Thanks Definite concern
Well is guess a good thing is they’re long and can be shortened
To the bench in the morning!

 

[AJC]

Thanks Definite concern
Well is guess a good thing is they’re long and can be shortened
To the bench in the morning!

If your not running any crimp setting them deeper should be easy baring any additional pressure the shorter coal will develop

 

[KY_Windage]

I'm guessing your lands seated the chambered rounds back to OTL for you.

 

[bozo699]

I'm guessing your lands seated the chambered rounds back to OTL for you.

I would think being a hunting rifle he’s running enough neck tension it won’t move a bit.
Wayne

 

[KY_Windage]

I would think being a hunting rifle he’s running enough neck tension it won’t move a bit.
Wayne

Yeah, probably. I never run much NT in rifle loads, even in hunting rounds. But either way, as Plumsask says above, you're gonna have a mess on your hands if you try to extract one.

Well, unless you had the foresight to keep the rifle vertical while extracting. Then you'd only have a stuck bullet in the barrel and some powder spilled on the ground.

 

[Scalloper]

Most 300 RUMs are freebore

 

[SPQR70AD]

I think I maybe very lucky, making a huge mistake.

In a rush to finish all items and get out prior to an Elk hunt, I rushed myself to load what was needed for this hunt.
I had been working a load prior for this hunt with my 300 RUM using a Berger 210 VLD, 91gr Retumbo, 215 GM and Nolser case.
When Working up this load I used my prior CBTO from a 200 Accubond which is 3.138.
I did numerous seating test and thought I came up with a real good load at .040 off the land / 3.098 matter of fact it shoots REAL good, running at roughly 3080fps.
Well it just now dawned on me what I did so I just check my CBTO with a Berger and that is touching the lands at 3.059 IDIOT!

So with that I was actually jamming the land at roughly .039

I made these load up in Oct / Nov and shot them at roughly sea level and a temp in the mid 50 and then shot them again in Colorado at 8000’ and a temp in the low 20’s, no issues at all

Question I have is what negative issues could you see happening from this?
I have heard that for hunting load you really should be a minimum .010 off the land to allow for any dust etc that may enter your chamber.

Let me get your thoughts

Much appreciated!

at least you admit your mistake. but why seat the bullets so close to the lands raising pressure in a high pressure round even it they did not touch the lands? you are not at a bench rest meet lol. shooting at an elk is like shooting at a volkswagen

 

[Butte Sink]

I have minimal NT using a Sinclair expander die , .001 so I agree a big MESS was most likely brewing.
When testing seating depth I always start with a .005 jump and thought my final load that shot best was .040, nope
In reality my first series of rounds was jammed .080 into rifling.
I’m thinking it could have got pretty ugly
Thanks all for getting back just happy I didn’t learn the hard way!!

 

[Butte Sink]

I'm guessing your lands seated the chambered rounds back to OTL for you.

You know I don’t know I never extracted a loaded a round and checked but that does make sense. Closing the bolt was never an issue but I use a Expander Mandrel and my NT is light .001 -.002

 

[Drop Port]

I have minimal NT using a Sinclair expander die , .001 so I agree a big MESS was most likely brewing.
When testing seating depth I always start with a .005 jump and thought my final load that shot best was .040, nope
In reality my first series of rounds was jammed .080 into rifling.
I’m thinking it could have got pretty ugly
Thanks all for getting back just happy I didn’t learn the hard way!!

At .001" Neck interference with a 200 NAB the good news is you were no where near .080" they were soft seating long before that.

 

[centerlineseal]

What about a bullet that is jammed .040 being exttracted if not fired and dumping powder with a bullet stuck in the beginning of the rifling?

Back in my VERY early reloading days, (40 years ago) I had this very same thing happen on opening morning of the Oregon Elk season. No rod, no nothin' to remove bullet, ... end of hunt!

What a Dufus!

 

[Webster]

What about a bullet that is jammed .040 being exttracted if not fired and dumping powder with a bullet stuck in the beginning of the rifling?

Plus powder in the trigger mechanism. I did it once. Difficult to clean in the field.

 

[bozo699]

What about a bullet that is jammed .040 being exttracted if not fired and dumping powder with a bullet stuck in the beginning of the rifling?

Did this during a match on a cease fire grrrr!...
I was able to get the bullet out and luckily had some canned air in my range box! Was able to finish my match but of course conditions changed and I couldn’t remember what they had been so group wasn’t great but all ten were on paper so I didn’t DQ but most importantly nothing or no one was hurt
Wayne

 

[SPQR70AD]

Plus powder in the trigger mechanism. I did it once. Difficult to clean in the field.

I did that once unloading an MI garand. bought the Lee factory crimp die and that was the end of that. use that die for every load I make now

 

[Hohn]

It’s a good thing all the rest of us have never made any loading mistakes so we can judge you.

 

[Albany Mountain]

I think I maybe very lucky, making a huge mistake.
Reseat the bullets deeper.
In a rush to finish all items and get out prior to an Elk hunt, I rushed myself to load what was needed for this hunt.
I had been working a load prior for this hunt with my 300 RUM using a Berger 210 VLD, 91gr Retumbo, 215 GM and Nolser case.
When Working up this load I used my prior CBTO from a 200 Accubond which is 3.138.
I did numerous seating test and thought I came up with a real good load at .040 off the land / 3.098 matter of fact it shoots REAL good, running at roughly 3080fps.
Well it just now dawned on me what I did so I just check my CBTO with a Berger and that is touching the lands at 3.059 IDIOT!

So with that I was actually jamming the land at roughly .039

I made these load up in Oct / Nov and shot them at roughly sea level and a temp in the mid 50 and then shot them again in Colorado at 8000’ and a temp in the low 20’s, no issues at all

Question I have is what negative issues could you see happening from this?
I have heard that for hunting load you really should be a minimum .010 off the land to allow for any dust etc that may enter your chamber.

Let me get your thoughts

Much appreciated!

Reseat them deeper and quit worrying

 

[sqrlgtr]

Never pulled a bullet out unchambering a round before, but did forget to clean chamber out in powder thrower the other day.Could have sworn I had cleaned it out last go around.Just happen to notice first 4 cases appeared fuller than the others..