I had an interesting adventure a few years ago, while on a deer hunt in north Florida that
made me consider buying my first magnum rifle. We always need some reason
to justify getting "another" new rifle. This is about as good a reason as I could
think of. This is a common scenario, so if it sounds familiar to you then maybe
you can use this story to justify getting another rifle too. This adventure really
did get me interested in hunting with a belted magnum caliber and that opened a whole
new set of reloading problems to solve.
I was
waiting in the most strategic location, overlooking a scenic view across a vast, wide open
clear-cut. We scouted this area the day before and found that it was totally covered
with fresh deer tracks. This would, more than likely, require a 400 to 500 yard shot. I was
confident of my laser range finder, trajectory chart, and my reliable .308 Winchester.
I really prefer hunting at long range. For one thing, your scent is not
quite as much of a problem. Just as we were coming to prime time (late
afternoon just before dark), I saw a nice 6 point buck that I was looking for, except that
he wasn't where he was supposed to be. The buck was 40 yards to my left
and still in the woods. This was an easy shot that I just couldn't refuse.
There was no chance that this deer would run off and cause a long search in the dark.
The crosshairs were locked on as I squeezed the shot. BLAM .... Well,
that deer took off running like a burnt boot. I remember saying out loud "No
way!" At that distance, how could he run away from this one? I knew
that the shot was placed perfectly and that he wouldn't go far. We recovered
that deer 50 yards away, deep into the thickest under brush you ever saw, and sure
enough ... it was a perfect shot right through the heart.
That type
of experience makes you wonder about taking really long shots. It would sure stack
the odds in your favor to use a magnum on extreme long-range shots. Most serious
long range hunters know that the velocity of their hunting ammo beyond 300 yards is not
exactly spectacular. If you're taking shots at that distance without using a magnum,
you could be spending more time in search parties than you might like. Tracking a wounded
deer through Florida's swampy terrain, in the dark, is no picnic. Even a 50 yard
search can become an almost impossible mission. I prefer to take one long
accurate shot and avoid all of the searching around in the dark. The 300 Winchester is
now one of my favorite cartridges for the long shots. There are also a few
good Weatherby Magnums that I like.
Last year, I
accurized a Browning 300 Win. Mag A-bolt Composite Stalker that has become my long range
deer blaster. Little did I know then that this magnum cartridge would be the start of an
expensive two year project. It started while developing a good load for say ...400 to
500 yards ... I know a great place in north Florida where it is still possible.
Almost any lightweight hunting rifle in a magnum caliber will generate plenty of recoil.
Several years ago, I experienced this phenomenon on a hunting trip where I
was almost knocked out of my tree stand from the recoil of a magnum rifle ... and it
would have been a long way down. It seems that you seldom have the luxury
of shooting from a comfortable position when the critical moment comes along.
I wanted to
see if an accurate, effective hunting load could be made for the 300 Winchester Magnum that
would shoot as flat as possible with reasonable recoil. I started off by reloading at the
range, like I usually do, to see how the pressure signs increase as the load develops. After
a few trips to the range, I decided to go with a very unusual combination that would
accomplish all of my objectives. The load uses a 130-grain Speer hollow point
bullet, Federal brass, 77.5 grains of IMR4350, Fed210 Match primer, and the overall
length is 3.230". This has a short overall length and will easily feed through the
magazine, but it has an enormous jump to the rifling. The important thing is that
this load will shoot consistent MOA groups in my rifle, and this particular bullet travels
at 3420 fps. The 130-grain Speer bullet was originally designed for varmints,
but it really performs well on deer at 200 to 500 yards. It's a great bullet that
can only travel this fast with the help of a magnum cartridge. This load is a flat
shooter but quite wind sensitive beyond 300 yards. However, during early
morning and late afternoon hunts in Florida, wind is not a problem. The recoil is
very mild with this load and it's a pleasure to shoot. In fact, the recoil feels
similar to shooting my .308 Winchester. I found this to be a promising handload,
so I planned to return on the following weekend with a few dozen rounds for the final
test.
I was feeling pretty darned confident that I was going to have real success when I
returned to the range ..... what could go wrong? We all know that feeling.
When I headed out to the range the wind was as still as I've ever seen it before and
there was blue sky in all directions. Then, I arrived to find that I had the whole
rifle range to myself. God was with me for sure. I took my time and got
everything set up to shoot my first group. That's when I found that my precious
handloads would not chamber. What a bummer! This brass was
only fired twice before and it was resized with the same Full Length resizing die that I
had been using, and it was made by one of the most popular die manufacturers.
That's when I remembered one of my shooting buddies tell me that he didn't reload
belted magnums, because the cases would swell up so much that they could only be
reloaded 2 or 3 times before the resizing die would fail to remove the bulge "just above"
the belt. He also said that belted magnums could swell up and increase the
diameter of the belt itself, although he said that he has never seen it happen that way.
Well I whipped out my calipers to see exactly what was causing me to loose
such a good day at the range.
The problem was a slight bulge "just above" the belt. My cartridges had swollen to
.514" after the second loading of my cases. This dimension starts out at .507"
on unfired Federal or Winchester cases. The "standard" case dimension in this
area is .511" according to all of my reloading manuals. The minimum SAAMI
spec chamber size, in this area is .5136" (and it's the same for 95% of all belted
magnum cartridges). I later tried using several types of dies and the same thing
just kept happening after the second or third reloading. This resizing problem
only occurs with belted magnum cases because of their unique case design.
I later found that this problem has been
around for over 50 years and lots of shooters are familiar with the case expansion problems that occur "just above" the belt.
In order to reduce any given area of your case, a FL resizing die needs to travel about .100" beyond contacting
that area, just to reduce the case diameter by .001". Belted cases prevent conventional resizing dies from
traveling far enough down the case. These cases soon develop a slight "bulge" around the pressure ring (usually after
just 2 or 3 firings) and when that happens, the case is useless. This case bulge happens during the reloading process - not
when it's in the chamber. Many shooters have discovered this problem the same way I did . . . . when their handloads
begin to stick in their chamber or when they no longer chamber at all.
You may have noticed what happens after running any kind of lubed case into a full length resizing die.
The case sticks when you start to withdraw it .... you're feeling the tension caused by the brass partially "springing back".
That's another reason why your sizing die needs to go slightly beyond any given area that is to be
resized. The resizing operation forces your case into a tapered resizing die so that the case diameter gets
returned close to the original dimensions. The problem with resizing belted magnum cases occurs when the die has
to stop at the belt on the case. Due to the design of belted cases, conventional resizing dies just can't go beyond the belt.
After just 2 or 3 firings, the case often bulges too much to be resized. Keep in mind that the case bulge happens during
the reloading process - not in the chamber. There must be a better way to reload belted magnum cases.
Remember the
nine-month project that I mentioned earlier? I found that there are a lot of shooters out there
that are aware of this condition with belted cases. Most of 'em found out about it the
same way that I did. There had to be a solution, so I called Bob Blane at
Sinclair International. Most of us know that these people are real serious
shooters and that they can supply us with every type of reloading tool and widget that
you can possibly imagine. He told me that "If you're shooting a belted magnum
cartridge, that's what happens ... period. There's nothing that you can do about
it". Gadzooks ... I might have actually come across something that really needs
to be invented!
I tested so much at the range that
some people may have thought that I lived out there.
Belted magnum
cartridges have existed for over fifty years with this problem. There must be a good sized
market for a new type of resizing die that would solve this reloading problem. This would
have to be a resizing die that could fit in any single stage reloading press. With a little help
from the SAAMI, I was able to examine the exact chamber and case dimensions for all
belted magnum cartridges. I discovered that if such a die could be made, it
would work on ALL of the popular belted magnum calibers including:
.257 Weatherby Magnum, 6.5 Remington Magnum, .264
Winchester Magnum, .270 Weatherby Magnum, 7 x 61 Sharpe & Hart,
7mm Remington Magnum, 7mm Weatherby Magnum, 7mm STW, .300
H & H Magnum, .300 Winchester Magnum, .300 Weatherby Magnum,
.308 Norma Magnum, 8mm Remington Magnum, .338 Winchester
Magnum, .340 Weatherby Magnum, .350 Remington Magnum,
.358 Norma Magnum, .375 H & H Magnum, .416 Remington
Magnum, .458 Winchester magnum and several wildcat belted cartridges.
I experimented with several different designs of collet resizing dies and I resized all of the different belted
calibers that I could get my hands on. I also fired 300 Win Mag cases that were fired in different
rifles to measure the effects of cases fired in a wide variation of chamber sizes. I fired mild loads
and hot loads, even a few "dragon" loads.
After making 4
expensive prototype dies, the project evolved into a totally new type of resizing die. The last
prototype resizing die required a specially designed collet that expands on both ends.
Then I had to overcome a problem that would reduce the force required to operate the press handle.
Critical angles were measured using an optical comparitor and measurements were taken into consideration
that produced smooth press operation and insured that it would work on more than 20 different belted
cartridges .... with using just this one die. The material selected was D2 because of the hardness and
resistance to rust. The heat treating took considerable time to determine the effect on the final
dimensions. To insure consistent tolerances I wound up making one final machine operation after the
die was hardened. The final product required a jillion man-hours and all of the determination that I had
before it was ...... perfected.
I received lots of help
from Greg and Ron
at WS Machine Inc. in Sanford, Florida.
They helped make this
"mission impossible" seem quite possible. Greg runs a very honest business with experienced
machinists and a fully equipped CNC machine shop. Without their help I doubt that I would have
ever completed this project. When the new resizing die was finished, it looked beautiful and it
worked like a charm. Now I can reload belted magnum cases more that 20 times with hot
handloads, and the cases are still looking good. This new design of resizing die reduces the
case diameter "just above" the belt and does not affect any other dimension. It is used after the
regular resizing operation. Belted magnum cases now have an extremely long life. The
primer pockets are "just barely" starting to loosen after 20 firings so I tossed 'em at that point.
The necks had barely started to harden, but there are still no signs of cracks. That's a great life
span for such expensive brass!
I was so impressed
with the end result, that I now have a patent pending for this tool. I call it the "Belted Magnum Collet
Resizing Die". I really bet the farm on this idea. My shooting buddies all
wanted to know when they could get their hands on one of my resizing dies.
They reminded me that "It was taking too long ... and after all, nobody lives forever"!
In case you have the urge to invent something it's a painfully slow process. Here
is a short list of things to overcome before you can make something like this available
to the public:
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