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Sizing 300 Win Mag
#6421846
08/24/16 04:05 AM
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Joined: Feb 2012
Posts: 9,731
Mickey Moose
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http://www.larrywillis.com/Scroll about half way down the page to "Belted Magnum Collet Resizing Die"... Belted magnum cartridges have been around for over 50 years, and most shooters that reload them are familiar with the case bulge problem that occurs "just above" the belt. This usually happens after just 2 or 3 firings - wasting perfectly good cases. Many shooters have discovered this problem when they find their handloads begin to stick in their chamber, or when they no longer chamber at all.
... Is the bulge problem real? Do RCBS, Redding, Forster, etc dies address this? I am new to reloading (have die sets for a couple cartridges) but need help in selecting 300 Win Mag dies. Will the basic full length die be fine or do I need to consider other sizing operations in addition? It's a bolt action which I will use to get my feet wet in "long" range target and will also hunt with the rifle. No competition. Thanks - Mickey
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Re: Sizing 300 Win Mag
[Re: Mickey Moose]
#6421868
08/24/16 04:27 AM
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Joined: Sep 2006
Posts: 32,506
kmon11
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junior
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It might be real for some chambers but not for all. Have a 264WM that is one that has expansion just above the belt to the point I cannot resize brass from it with either RCBS or Redding FL dies without an extra step. Figured out early on that I can first size the 264 brass in a 300 Weatherby mag FL die without the stem and resize that portion then use the 264 die to complete the sizing. Using this method I got 5 loads before chunking the brass due to getting a ring you could feel with a paperclip at the case head juncture.
That is the only one I have ever seen the ring on with loading a few other belted magnums: 257 and 300 Weatherby, 7mm Remington, 7mmSTW and 350 Rem Mag.
By the way the belted magnum case has been around a lot more than 50 years, try over 100 years in the H&H and 70 years in the Weatherby line.
lf the saying "Liar, Liar your pants on fire" were true Mainstream news might be fun to watch
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Re: Sizing 300 Win Mag
[Re: kmon11]
#6421870
08/24/16 04:36 AM
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Joined: Feb 2012
Posts: 9,731
Mickey Moose
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It might be real for some chambers but not for all. I think that alone tells me how to start - a basic FL die set and see where that gets me. No need to worry about case conditions that may not result from my specific chamber.
My botnet is bigger than yours.
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Re: Sizing 300 Win Mag
[Re: Mickey Moose]
#6421876
08/24/16 04:52 AM
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Joined: Sep 2006
Posts: 32,506
kmon11
junior
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junior
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It might be real for some chambers but not for all. I think that alone tells me how to start - a basic FL die set and see where that gets me. No need to worry about case conditions that may not result from my specific chamber.
lf the saying "Liar, Liar your pants on fire" were true Mainstream news might be fun to watch
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Re: Sizing 300 Win Mag
[Re: Mickey Moose]
#6421909
08/24/16 10:20 AM
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Joined: Aug 2011
Posts: 13,415
jdk1985
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Even with the collet resizing die, you will have to have a FL die as well. The collet die only sizes the case right above the belt. I have a rifle that required the collet die in addition to FL sizing. It works well with Imperial sizing wax/lube.
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Re: Sizing 300 Win Mag
[Re: Mickey Moose]
#6421974
08/24/16 11:56 AM
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Joined: Feb 2009
Posts: 5,872
GLC
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I have reloaded 300 win mag brass over 4 times and have not experienced "the bulge" yet. I full size each time. Just put enough lube on it.
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Re: Sizing 300 Win Mag
[Re: Mickey Moose]
#6422016
08/24/16 12:43 PM
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Joined: Sep 2009
Posts: 18,954
ChadTRG42
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It might be real for some chambers but not for all. I think that alone tells me how to start - a basic FL die set and see where that gets me. No need to worry about case conditions that may not result from my specific chamber. That's it!! 99% of 300 WM chambers will not need it. There are some smith's that will chamber a belted magnum round with a match reamer. Match reamer means a minimum spec reamer, and tight in the case body and case web area. I have run into this problem on 2 customers' rifle's that had a chambering issue just above the belt. The cool thing, is you can even use the collet die with a loaded round. So, even if you have this issue, you can still size the area just above the belt with it loaded after the fact. All it does is squeeze the brass area right above the belt.
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Re: Sizing 300 Win Mag
[Re: ChadTRG42]
#6422145
08/24/16 02:29 PM
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Joined: Feb 2012
Posts: 9,731
Mickey Moose
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It might be real for some chambers but not for all. I think that alone tells me how to start - a basic FL die set and see where that gets me. No need to worry about case conditions that may not result from my specific chamber. That's it!! 99% of 300 WM chambers will not need it. There are some smith's that will chamber a belted magnum round with a match reamer. Match reamer means a minimum spec reamer, and tight in the case body and case web area. I have run into this problem on 2 customers' rifle's that had a chambering issue just above the belt. The cool thing, is you can even use the collet die with a loaded round. So, even if you have this issue, you can still size the area just above the belt with it loaded after the fact. All it does is squeeze the brass area right above the belt. I should have also mentioned this is a factory rifle. Maybe I'm erroneously reading too much into what you and others have said (and what I've seen elsewhere) but that puts the odds even more in my favor (not experiencing bulge). Either way, it's just a few clicks and I'll have 300WM dies to get started! Good deal, thanks everybody for the information and education.
My botnet is bigger than yours.
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Re: Sizing 300 Win Mag
[Re: Mickey Moose]
#6422151
08/24/16 02:33 PM
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Joined: Sep 2009
Posts: 18,954
ChadTRG42
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A standard FL die will for you just fine. Remember, they are trying to promote and sell a product. If they convince you that you need it, then you may buy it. But if you ever do need it, it's always there.
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Re: Sizing 300 Win Mag
[Re: ChadTRG42]
#6422188
08/24/16 02:55 PM
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Joined: Feb 2012
Posts: 9,731
Mickey Moose
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Remember, they are trying to promote and sell a product. If they convince you that you need it, then you may buy it. Yep, and with having no experience they were able to pique my skeptical curiosity thus compelling me to ask people I "know and trust" relative to some random site that wants my money. Thanks again.
My botnet is bigger than yours.
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Re: Sizing 300 Win Mag
[Re: Mickey Moose]
#6425161
08/26/16 03:44 AM
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Joined: Feb 2012
Posts: 9,731
Mickey Moose
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2-die set is on the way. Should arrive in a few days.
'Murica
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Re: Sizing 300 Win Mag
[Re: Mickey Moose]
#6432430
08/31/16 03:09 AM
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Joined: Feb 2012
Posts: 9,731
Mickey Moose
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Dies were delivered today.
As you were.
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