Rod Outback
2015-09-02 03:11:33 UTC
Folks,
Loaded up 53 of my 7mm-08 cases yesterday. These are all the same brand of
brass (Winchester), and have been sized and trimmed to length. I'm loading
up the last of my Nosler 120Gn Ballistic Tips, which are about the only
projectiles I have for this cartridge. When the rifle first arrived in late
2013, my shooting mate loaded up the 100 140Gn BT projectiles, and also 50
of the 120Gn BT projectiles, as he worked up loads for each weight, before
loading the remaining up with the most accurate load. Since then, the only
projectiles I have been able to source in the Nosler range, have been the
120Gn BT projectiles.
[In the past 2 months, I did source some 120Gn Hornady V-Max bullets, but
they are yet to have the seal broken on them...]
I loaded a batch of 20 initially, as it is the first time I have set these
dies up in the new Forster press.
[The Phukup Fairy REALLY likes living with me, so doing a smaller initial
batch saves me a LOT more crying when I have to start again...]
So, my final step in my process, is to weigh each loaded cartridge. It
doesnt take long to come up with the most common weight for each brand of
brass for that projectile weight, and so it gives me a yard-stick to check
everything against.
So, of the 20 loaded cartridges, 14 weigh close to the same weight (within 3
grains of each other), wheras the other 6 all weigh 30 grains heavier, but
all within 3 grains of each other as well!
Now, one of the reasons I started weighing loaded rounds, is as a final
check to ensure I havent made the colossal mistake of either NO powder, or a
partial charge.
But almost exactly 30 grains heavier?? Thats not enough for a double charge
(which wont fit in the case anyway), but too much for simple case variation.
WTF is going on??
After smoko, I return to the gunroom, and weigh the prepped empty cases that
remained (33), in the hope that I would find the same clustering of weights
of the empty brass.
Nope; the brass all weighs within 2 grains of each other.
Bugger!
So, I load 2 cartridges up, and bugger me if they dont weigh 30 grains
apart!!
So, I have now explored all the freaking obvious, and so I move into the
unbelievable...
I pour all the projectiles out, and weigh each one. In amongst the box of
50 Ballistic Tips, I have at least 11 150Gn Ballistic Tips!
Yep; I seem to have a mixed bag of weights from an out-of-the-sealed box of
projectiles from Dr Nosler!!
I ran the callipers over all the suspect projectiles, and they are
definitely 7mm (which matches the colour-coded polymer tip).
I weighed each of these projectiles individually, and they are all 150gns.
I pull all the suspect loaded cartridges, and each are loaded with the 150Gn
BT projectiles as well. In total, I find I have 17 of them.
I also pulled a handfull of the loaded cartridges with the correct weight,
and they all have 120gn pills in them.
The load I am using is toward the top end of the recommended load range(it
was the tightest grouping), and this charge behind a 150Gn pill would make
them around 3.4 grains over max recommended load.
Now, I appreciate that the rifle would likely handle being slightly over
charged, but 3.4 grains high might be pushing the friendship somewhat!!
I have NEVER bought 150Gn BT projectiles, as I understood 139gn was the
sweet spot for performance, and I then found I couldnt source any additional
140Gn BT projectiles, so we settled on the lighter 120Gn pills.
Further; I have never had loose 140gn projectiles here, as my mate took them
all away, and loaded them all up at his place while undertaking load
testing.
I have rummaged through all the used boxes of projectiles(I keep them as
they come in handy for storing away little things some time), and none of
the 7mm boxes are for anything other than 120Gn BT's.
I have NO-ONE else in the district whom uses 7mm, and not even any of my
distance shooting mates have 7mm rifles, so it's nigh impossible that some
kindly soul tucked some spare projectiles into my inventory without my
knowledge.
I have been through ALL of the spent brass for 7mm-08 I have, and NONE show
signs of overpressure, which I'm damn sure would be obvious if loaded 3.4
grains over max!
I have weighed the remaining 30 loaded cartridges from the previous loading
session back in July, and they all weighed the same weight as the 120gn
loaded cartridges from this current batch.
I then loaded up all the prepped brass (including the ones I pulled) with
120gn BT pills, and the loaded cartridges all weigh within 3 grains of each
other.
So, there are two possible options that I can see:
1). I received a complete box of 150Gn BT projectiles, which were labelled
as 120Gn.
-- OR --
2). I received a box of 120gn BT projectiles, with a sprinkling of 150gn BT
projectiles included, just to add to the mix!
Now, EITHER option is of concern, but worryingly, I find it's more likely
that the second possibility is the one. I cant find any spent brass with
overpressure signs (and there should be at least 33 spent cartridges showing
these signs, if I had a whole box of them).
I only have 210 brass cases in 7mm-08 at present, so it's a bit hard to miss
33 of them!
So....could I prove any of this to Dr Nosler??
Probably not. I cant even remember exactly what projectiles were purchased
when.
I do know that I have never purchased projectiles of this weight, and I have
no-one whom could have mistakenly given them to me.
HOWEVER, from this, I learned a few golden rules:
1). I now have a BLOODY GOOD reason why the extra step of weighing the
loaded cartridges at the end, is a really wise safety step.
2). NEVER ASSUME the projectiles are all as stated on the box; even when
it's sealed. It's pretty quick to weigh a sealed box, and divide by quantity
to get a rough idea if they seem right.
3). I'm going to add weighing projectiles to my process, just as a
precaution.
4). Even buying a quality brand doesnt guarantee they will get their quality
control right all the time(this shouldnt be a big surprise)...
5). Those little digital gem scales are worth their weight in gold...
Well; That lesson could have ended up a lot more painfully learned...
I wonder what the Phukup Fairy has in store for her next effort...
-------
Cheers,
Rod...Out Back
-------
For Photos I've taken since June 2013:
http://s1035.photobucket.com/user/Rod_Outback/library/
For a Roundup of photos taken until Flickr ruined their site in 2013, have a
look at
http://www.flickr.com/photos/rod_outback/
Loaded up 53 of my 7mm-08 cases yesterday. These are all the same brand of
brass (Winchester), and have been sized and trimmed to length. I'm loading
up the last of my Nosler 120Gn Ballistic Tips, which are about the only
projectiles I have for this cartridge. When the rifle first arrived in late
2013, my shooting mate loaded up the 100 140Gn BT projectiles, and also 50
of the 120Gn BT projectiles, as he worked up loads for each weight, before
loading the remaining up with the most accurate load. Since then, the only
projectiles I have been able to source in the Nosler range, have been the
120Gn BT projectiles.
[In the past 2 months, I did source some 120Gn Hornady V-Max bullets, but
they are yet to have the seal broken on them...]
I loaded a batch of 20 initially, as it is the first time I have set these
dies up in the new Forster press.
[The Phukup Fairy REALLY likes living with me, so doing a smaller initial
batch saves me a LOT more crying when I have to start again...]
So, my final step in my process, is to weigh each loaded cartridge. It
doesnt take long to come up with the most common weight for each brand of
brass for that projectile weight, and so it gives me a yard-stick to check
everything against.
So, of the 20 loaded cartridges, 14 weigh close to the same weight (within 3
grains of each other), wheras the other 6 all weigh 30 grains heavier, but
all within 3 grains of each other as well!
Now, one of the reasons I started weighing loaded rounds, is as a final
check to ensure I havent made the colossal mistake of either NO powder, or a
partial charge.
But almost exactly 30 grains heavier?? Thats not enough for a double charge
(which wont fit in the case anyway), but too much for simple case variation.
WTF is going on??
After smoko, I return to the gunroom, and weigh the prepped empty cases that
remained (33), in the hope that I would find the same clustering of weights
of the empty brass.
Nope; the brass all weighs within 2 grains of each other.
Bugger!
So, I load 2 cartridges up, and bugger me if they dont weigh 30 grains
apart!!
So, I have now explored all the freaking obvious, and so I move into the
unbelievable...
I pour all the projectiles out, and weigh each one. In amongst the box of
50 Ballistic Tips, I have at least 11 150Gn Ballistic Tips!
Yep; I seem to have a mixed bag of weights from an out-of-the-sealed box of
projectiles from Dr Nosler!!
I ran the callipers over all the suspect projectiles, and they are
definitely 7mm (which matches the colour-coded polymer tip).
I weighed each of these projectiles individually, and they are all 150gns.
I pull all the suspect loaded cartridges, and each are loaded with the 150Gn
BT projectiles as well. In total, I find I have 17 of them.
I also pulled a handfull of the loaded cartridges with the correct weight,
and they all have 120gn pills in them.
The load I am using is toward the top end of the recommended load range(it
was the tightest grouping), and this charge behind a 150Gn pill would make
them around 3.4 grains over max recommended load.
Now, I appreciate that the rifle would likely handle being slightly over
charged, but 3.4 grains high might be pushing the friendship somewhat!!
I have NEVER bought 150Gn BT projectiles, as I understood 139gn was the
sweet spot for performance, and I then found I couldnt source any additional
140Gn BT projectiles, so we settled on the lighter 120Gn pills.
Further; I have never had loose 140gn projectiles here, as my mate took them
all away, and loaded them all up at his place while undertaking load
testing.
I have rummaged through all the used boxes of projectiles(I keep them as
they come in handy for storing away little things some time), and none of
the 7mm boxes are for anything other than 120Gn BT's.
I have NO-ONE else in the district whom uses 7mm, and not even any of my
distance shooting mates have 7mm rifles, so it's nigh impossible that some
kindly soul tucked some spare projectiles into my inventory without my
knowledge.
I have been through ALL of the spent brass for 7mm-08 I have, and NONE show
signs of overpressure, which I'm damn sure would be obvious if loaded 3.4
grains over max!
I have weighed the remaining 30 loaded cartridges from the previous loading
session back in July, and they all weighed the same weight as the 120gn
loaded cartridges from this current batch.
I then loaded up all the prepped brass (including the ones I pulled) with
120gn BT pills, and the loaded cartridges all weigh within 3 grains of each
other.
So, there are two possible options that I can see:
1). I received a complete box of 150Gn BT projectiles, which were labelled
as 120Gn.
-- OR --
2). I received a box of 120gn BT projectiles, with a sprinkling of 150gn BT
projectiles included, just to add to the mix!
Now, EITHER option is of concern, but worryingly, I find it's more likely
that the second possibility is the one. I cant find any spent brass with
overpressure signs (and there should be at least 33 spent cartridges showing
these signs, if I had a whole box of them).
I only have 210 brass cases in 7mm-08 at present, so it's a bit hard to miss
33 of them!
So....could I prove any of this to Dr Nosler??
Probably not. I cant even remember exactly what projectiles were purchased
when.
I do know that I have never purchased projectiles of this weight, and I have
no-one whom could have mistakenly given them to me.
HOWEVER, from this, I learned a few golden rules:
1). I now have a BLOODY GOOD reason why the extra step of weighing the
loaded cartridges at the end, is a really wise safety step.
2). NEVER ASSUME the projectiles are all as stated on the box; even when
it's sealed. It's pretty quick to weigh a sealed box, and divide by quantity
to get a rough idea if they seem right.
3). I'm going to add weighing projectiles to my process, just as a
precaution.
4). Even buying a quality brand doesnt guarantee they will get their quality
control right all the time(this shouldnt be a big surprise)...
5). Those little digital gem scales are worth their weight in gold...
Well; That lesson could have ended up a lot more painfully learned...
I wonder what the Phukup Fairy has in store for her next effort...
-------
Cheers,
Rod...Out Back
-------
For Photos I've taken since June 2013:
http://s1035.photobucket.com/user/Rod_Outback/library/
For a Roundup of photos taken until Flickr ruined their site in 2013, have a
look at
http://www.flickr.com/photos/rod_outback/