Long Range Hunting Online Magazine


Go Back   Long Range Hunting Online Magazine > Rifles, Reloading, Optics, Equipment > Reloading

Reloading Techniques For Reloading


Reply

7mm-300WSM wildcat

 
LinkBack Thread Tools Display Modes
  #8  
Old 03-16-2009, 11:55 PM
Junior Member
 
Join Date: Mar 2009
Posts: 22
Re: 7mm-300WSM wildcat

I have a rifle chambered in this round. This was my first wildcat round also. I searched for info when I had it built without much success. I am no pro but this is what I do and it works well for me. I use Norma brass and a Redding competition bushing neck sizing die set. A rep. from Redding told me not to move the brass more than .007" at a time, so worried about scrapping brass this is what I did. I used a .330" bushing, then .324", .318", and .315" to final neck size. This was much easier than I thought it would be. I didn't aneal at all. It took me about an hour to do my first 50 pcs. and have fired it 4x. I have not had any donut problems. I shoot 180 bergers and it is a tack driver! I have no regrets about having my rifle chambered in this round. Hope this helps.
Reply With Quote
  #9  
Old 03-17-2009, 02:24 AM
Platinum Member
 
Join Date: Apr 2005
Location: Alaska
Posts: 3,348
Re: 7mm-300WSM wildcat

Quote:
Originally Posted by phorwath View Post
You're stepping down the neck about 0.024" (.308-.284), so one-step resizing of the neck should be no problem whatsoever. Good luck and this sounds like an interesting cartridge - which is what drew my attention to your post in the first place.
nheninge,

MBrown's post caused me to realize that you were planning to neck down using a Redding S-type FL sizing die with neck bushings. I had to go back and read your initial post to confirm this. I've never sized necks down a full caliber using the Redding FL neck bushing style resizing die, so you better follow MBrown's advice if that's what you're planning to do.

I was thinking you'ld be using a standard 7mm WSM FL sizing die to neck down the 300 WSM brass by setting the die depth so that it only sized the neck down - without setting the shoulder back. It would be possible to proceed as I envisioned, but it appears you would need to grind 0.200" off the bottom of the 7mm WSM die so that the 300 WSM case neck could be sized all the way down to the shoulder. Using this approach you could neck down up to ~ 0.030" in a single step. I know grinding 0.200" off the base of a 7mm WSM FL sizing die sounds crude, but I've done this before and the die is completely functional for its purpose. It just looks rough on the bottom end. If you have a lathe, then the 0.200" can be turned off in a lathe and the die will both work and look nice too. Purchasing 4 Redding neck bushings simply to size down your case neck in four small steps will cost more than purchasing a standard plain-Jane 7mm WSM FL resizing die, and will require four separate steps. Just tossing this option out there for your consideration. I wouldn't even use the expander ball if you went this way. Set the die in the press to resize the entire case neck, then use the outside neck turning expander mandrel to expand the case neck to the proper ID for outside neck turning.

Sorrry for not providing information applicable to your specified neck-down process the first time around. I don't know how far you can neck down in one step with a neck bushing style die. You better follow MBrown's method if you go that route.

Last edited by phorwath; 03-17-2009 at 02:28 AM.
Reply With Quote
  #10  
Old 03-17-2009, 10:13 AM
Silver Member
 
Join Date: Oct 2008
Location: Bryan, Tx
Posts: 284
Re: 7mm-300WSM wildcat

Thats the kind of detail I need!. Thanks guys. I was surprised to think it could be done in one step, but it is so easy to order intermediate bushings. I too want 180 Bergers with a 1:9 barrel twist. At least this is what I think I need after reading Bryan Litz's test data (nice work, and a hell of a reference).

With the norma brass, what was your final bushing size with the norma brass? I am guessing about a 0.309-.310? Here is my quite possibly faulty equation:
0.284 + 0.028 - 0.002 - 0.001 (bullet diameter/neck thickness X2/neck tension desired/brass springback, respectively).

Have you noticed any springback with the Norma brass? (0.001?)
What was your final neck thickness after turning (if turned)?

I'll be taking the brass down as soon as I get the bushings!
I plan on annealing after every firing

I want a long range tack driving SOB that can outshoot my abilities. Hope this is it.
Reply With Quote
  #11  
Old 03-17-2009, 10:27 AM
Silver Member
 
Join Date: Oct 2008
Location: Bryan, Tx
Posts: 284
Re: 7mm-300WSM wildcat

Expander balls might just be the root of all that's evil. However, the Forster press with its floating die seems to negate most of the case runout problems seen in fixed dies. Still don't plan on using expanders.
Reply With Quote
  #12  
Old 03-17-2009, 05:43 PM
Junior Member
 
Join Date: Mar 2009
Posts: 22
Re: 7mm-300WSM wildcat

The final bushing I use is .315". Norma loaded with a 180 berger measures .316".

My brass doesn't show any spring back but I measured it with a digital caliper so it is under .0005" at the most.

The wall thickness measures .0165" and I have not turned the necks.

P.S. I use a 300wsm Redding competition bushing die set.
Reply With Quote
  #13  
Old 03-17-2009, 09:54 PM
Silver Member
 
Join Date: Oct 2008
Location: Bryan, Tx
Posts: 284
Re: 7mm-300WSM wildcat

I do plan on taking the necks down to 0.014 or so, although the necks on Norma brass are pretty even anyway.

Since I have your attention, what primer/powder combo has given you the best results?

I too will use redding comp dies for sizing and a wilson style bullet seater cut with the same reamer.
Reply With Quote
  #14  
Old 03-17-2009, 09:59 PM
Junior Member
 
Join Date: Mar 2009
Posts: 22
Re: 7mm-300WSM wildcat

The loads that are popular with the 7wsm work with this cartridge also. I like federal GMM 215 primers and Hodgdon H4831SC @ 62.5 grn in my rifle.
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes


Similar Threads for: 7mm-300WSM wildcat
Thread Thread Starter Forum Replies Last Post
A .300 MAG Wildcat? kc Reloading 6 09-06-2011 05:56 PM
Need some help with a new wildcat Stormbringer Rifles, Bullets, Barrels and Ballistics 0 09-30-2009 12:27 PM
25-300 wildcat butcher307 Guns For Sale 2 10-22-2008 10:40 PM
25 cal 125 uld wildcat chino034 Rifles, Bullets, Barrels and Ballistics 0 04-07-2008 05:58 PM
6.5 Wildcat gbp Reloading 3 05-09-2007 08:03 PM

Current Poll
Do you wear hearing protection while hunting?

All times are GMT -5. The time now is 03:10 PM.


Powered by vBulletin ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Management Powered by vBadvanced CMPS
All content ©2010-2014 Long Range Hunting, LLC