.300 win mag and case life....how many reloads

USW.260

USW.260

Sergeant
Full Member
Minuteman
Dec 13, 2010
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The World as we know it.
#1
Ok I understand that it all depends on my loads if I run them hot then that reduces how many times I can resize my brass.

So whats the norm for you guys/gals.

And like non-belted rounds, just setting the shoulders back so they feed without a problem and the bolt closes, can this be done on a belted Magnum or does it run into a half belt-half shoulder kinda thing when resizing for my chamber?

I will be shooting mostly Win brass as its not that expensive and everywhere. I will be running from a mag setup and single loading for F-class. Thanks
 
#5
Re: .300 win mag and case life....how many reloads

I have some Federal and Nosler brass that have well over 15, some 20 loadings. Mild load and use a Redding body die to touch the shoulder, but mostly to resize the base above the belt. Haven't needed the Willis die yet.

HOT load in Winchester brass is giving loose primers after 2-3 firings.

Moral? Load conservative and don't oversize your brass and it will last a LOOONG time.

John
 
#7
Re: .300 win mag and case life....how many reloads

The Redding body die is a great way to go with the .300 WM. Like jrob I use mine to tweak the shoulder down and size the body, I then use a neck sizing die. This way I'm minimising both excessive case sizing and also run-out.
 
#9
Re: .300 win mag and case life....how many reloads

I have used WW brass in the past. I got 7-8 loadings with 74.0 grains of H1000 before the primer pockets got too loose. I also index my headspace off the shoulder, just like a non-belted case.

I have since switched to Nosler, but have only shot them twice, so the jury is still out on their case life.
 
#10
Re: .300 win mag and case life....how many reloads

i just got a 300WM and need to start reloading it. I have the Lee die set now, but it only has a full size die. I was planning on picking up the Lee Collet Neck Size die to use, I dont quite get what the added benifit of going with the Willies die above would gain me for that high price.

Can someone help explain what I really need to order?
 
#11
Re: .300 win mag and case life....how many reloads

If you want to use the Lee collet die, then get a Redding body die for bumping the shoulder and sizing the body back down. Do both every firing.

*IF* you run into cases that still will not chamber because of stretch above the belt, buy a Willis die. I've never needed one, as I feel the Redding body die does a better job of reshaping above the belt than most FL dies I've seen.

John
 
#12
Re: .300 win mag and case life....how many reloads

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: jrob300</div><div class="ubbcode-body">If you want to use the Lee collet die, then get a Redding body die for bumping the shoulder and sizing the body back down. Do both every firing.

*IF* you run into cases that still will not chamber because of stretch above the belt, buy a Willis die. I've never needed one, as I feel the Redding body die does a better job of reshaping above the belt than most FL dies I've seen.

John </div></div>

I have never used a Body die before, what exactly does it do differently than a Full Size resizing die?
 
#13
Re: .300 win mag and case life....how many reloads

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: REL1203</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: jrob300</div><div class="ubbcode-body">If you want to use the Lee collet die, then get a Redding body die for bumping the shoulder and sizing the body back down. Do both every firing.

*IF* you run into cases that still will not chamber because of stretch above the belt, buy a Willis die. I've never needed one, as I feel the Redding body die does a better job of reshaping above the belt than most FL dies I've seen.

John </div></div>

I have never used a Body die before, what exactly does it do differently than a Full Size resizing die? </div></div>

It's a lot like a FL die, but the neck is bigger so it leaves it untouched, so you can size the neck to the tension you choose with a Lee collet die or Type S bushing die.
 
#14
Re: .300 win mag and case life....how many reloads

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: jrob300</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: REL1203</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: jrob300</div><div class="ubbcode-body">If you want to use the Lee collet die, then get a Redding body die for bumping the shoulder and sizing the body back down. Do both every firing.

*IF* you run into cases that still will not chamber because of stretch above the belt, buy a Willis die. I've never needed one, as I feel the Redding body die does a better job of reshaping above the belt than most FL dies I've seen.

John </div></div>

I have never used a Body die before, what exactly does it do differently than a Full Size resizing die? </div></div>

It's a lot like a FL die, but the neck is bigger so it leaves it untouched, so you can size the neck to the tension you choose with a Lee collet die or Type S bushing die. </div></div>

Interesting, I will have to look into that.. So with a combination of the Redding Body Die first, then the Lee Neck Sizing Die, I should be good to go and get more than 3 or so reloads from good brass?
 
#15
Re: .300 win mag and case life....how many reloads

Again, it depends on your load. I've seen loads ruing brass in one firing. WAY too hot. If you load conservatively and don't overwork your brass by pushing the shoulder back too far, should last quite a few firings.

John
 
#16
Re: .300 win mag and case life....how many reloads

i use this.....but then again i'm a brass ho...
MVC-032S-1.jpg
 
#18
Re: .300 win mag and case life....how many reloads

I'm running fairly hot loads with 208's in and am able to get away with body sizing every other firing and using the Lee collet die for the neck sizing operation. However I always check a sample of of the case for chamber fit and if the bolt's stiff will body size. This combo is very cost effective and is a great option for case life and accuracy.
 
#19
Re: .300 win mag and case life....how many reloads

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: jrob300</div><div class="ubbcode-body">Bolt, you SB size every time?

John</div></div>


mostly yes.......only for rouge goats or cabrito...
 
#22
Re: .300 win mag and case life....how many reloads

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: caustic</div><div class="ubbcode-body">can someone tell me what an S B die does? thanks </div></div>

SB=small base=MAX RESIZE
 
#23
Re: .300 win mag and case life....how many reloads

The problem with small base (SB) dies, is that they also plow the brass towards the belt. SB dies put far more downward pressure on your case. This resizing method thins (and hardens) the brass, and it bulges cases during the reloading process.

The patented <span style="font-weight: bold"><span style="text-decoration: underline">Belted Magnum Collet Resizing Die</span></span> resizes the case ONLY inward, and the top of this die is a lso a case width gauge that shows when a little "extra" resizing is needed.

Keep in mind that if your handloads are just .001" (one thousandth of an inch) larger that your chamber - they won't chamber. You can measure your case bulge with ordinary calipers. All of the popular belted cases measure .507" above the belt when they're new. You should not be able to "feel" your rounds chamber - not even a little bit.

- Larry






 
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