300 Win Mag - Getting started with reloading

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Published 2018-12-28

It's time to finally get started with reloading for the Thompson Center Compass 300 Winchester Magnum.
This is an extremely long video, so here are links to the different topics:
0:00:00 - Intro
0:05:00 - Reloading Components Discussion
0:12:00 - Reloading Equipment Discussion
0:25:00 - Brass Resizing and Prep
0:54:00 - Load Data Discussion
0:57:00 - Measuring Max OAL and Choosing Test OALs
1:06:00 - Priming, Powder Charging and Bullet Seating
1:17:00 - Range Test
1:31:00 - Brass Check and Group Review
1:35:00 - Future Plans and Conclusion

Here are some links to a lot of the gear I used in this video. These are Amazon affiliate links.

➤Hornady Custom Grade Die Set (not the bushing style) amzn.to/2BG1oAK
➤Hornady Microjust Seating Stem amzn.to/2GIVKUk
➤Hornady Shell Holder #5 amzn.to/2Vdj4wv
➤Hornady Match Grade Full Length Die (bushing style) amzn.to/2BMs2Ij
➤Hornady .332 Bushing amzn.to/2VamrVb
➤Hornady ELD-X Seating Stem (there are several other 30 cal seating stems available for other bullet types as well) amzn.to/2AiIFeu
➤Weaver 4-hole Skeleton Scope Rings (30mm) amzn.to/2Sr5xzG
➤Vortex Strike Eagle 4-24x50 Scope. I have one of these and really like it as a budget 24x scope. amzn.to/2SiVUTA
➤Frankford Arsenal Perfect Fit Reloading Tray. You want the #7 for 300 Win Mag amzn.to/2LCLZWt
➤MTM 50 Round Ammo Box amzn.to/2So194z
➤Hornady Headspace Comparator kit amzn.to/2LEquob
➤Hornady Bullet Comparator kit amzn.to/2LGA5Lq
➤Redding Imperial Sizing Die Wax amzn.to/2RmQqdo
➤Redding Flash Hold Deburring Tool amzn.to/2BIJNrS
➤Lyman Powder Funnel Set amzn.to/2BHJ7Da
➤WAOAW Digital Scale amzn.to/2SqgQIf
➤Lyman Check Weight Set amzn.to/2BHD6Gr
➤RCBS Universal Hand Priming Tool amzn.to/2SjVhJv
➤RCBS Micrometer amzn.to/2SiXi8K

All Comments (21)

@ronjoseph4131 3 years ago

I started watching yesterday, but I took a drink every time bushing flashed on the screen. I passed out. Excellent video very informative
@Kriegerpvp 5 years ago

This is fantastic, I just got myself a Bergara b-14 ridge in 300WM, this is all great stuff! So much useful information for my own journey down the rabbit hole of reloading 300wm. I'm reloading 180gn nosler Accubonds with 79 gr of ADI 2217, which is the ADI equivalent of H1000, after much of your advice and tips, I've successfully not blown my face off. I love your channel! keep the 300WM videos coming!
@WestDesertShooter 5 years ago

A JRB feature film! It’s hard to comprehend just how much knowledge is in this video all available for free. Great stuff man thanks so much!
@Wellsey302 5 years ago

Yes!!! Best $10 I ever paid on YouTube. Basically paid for a JRB movie ticket
@joshr9689 5 years ago

I just bought my 300 win mag yesterday then came home and hopped on your channel. I was very dissapointed you hadn't covered it then low and behold this morning this popped up. Love your channel.
@judofry 5 years ago

Plops over an hour of video content on the table with a meaty thwack
@jeffkessel2440 3 years ago

I found the "bushing" to be fantastically hilarious. Every time it flashed up, I laughed. Thanks for that.
@IowaBuckSlayer 5 years ago

That’s a lot of information to take in. I may have to watch this a couple times. Thanks for taking the time to make a video of this magnitude.
@joeykennedy5910 5 years ago

I have been waiting for these videos forever and I don't even own a 300 win mag yet
@yle8708 5 years ago

I've heard a lot of people saying a lot of different things as far as belted magnums and the bulge around the belt. I'd love to see a long term review of two different lots of brass one using the Larry Willis collet die and the other using standard full length sizing dies and see what the results are. Thanks for all the awesome videos and the info you provide.
@No1JetDoc 5 years ago

I've avoided the bushing dies up to this point. Getting bushing die info along with 300 win mag reloading info is a real bonus! Thanks! Excellent as always!
@daleb1225 5 years ago

An hour and thirty six in your humor got to me, thank you for the dedication and work you put into this along with your humor.
@bowerplace8909 2 years ago

I've been shooting the 300 win mag 30+ years, been reloading it for 20+ years. Shot most everything from gophers to grizzlies. From 15 yards to an elk at 890 yards. It just works. My reload recipe is what really works in my riflr. Winchester modle 70 classic s/s with a boss.(first one in Canada ) 24 inch barrel, +boss 73 grains 7828 powder Win./ fed brass Win. Mag primer 200 grain seirra game king Average 2960 fps ( 10 shot average ) Full lenth resized and trimmed every time. Some cases reloaded more than 6/7 times. Hunting in the East Kootanys Canada.from the bottom lands to top of the Rockies. It works.
@robertglass4891 3 years ago

Still relatively new to reloading and just getting into long range precision. So much learned from this video, you really did cover everything. Thank you
@thebigmansoutdoors 5 years ago

Reloading the 300 win mag is going to be my summer project..
@HikeHuntHaul 3 years ago

I had to watch this video all over again. Great video! Lots of thought, incite, and detail to what you need to pay attention to when reloading 300 win mag. I’ll probably watch it again and learn something new from it each time 😃👍🏻 thanks for sharing!
@smithjones1906 5 years ago

Watched this from start-to-finish. One of the most educational channels on YouTube.
@orkboy59 5 years ago

I started watching this morning and had to finish it after work and some 6.5 Creedmoor brass prep. Great stuff though. I always enjoy your long videos. They are very thorough.
@JW-mt4vb 3 years ago

Just getting into the 300WM myself and I loved this video very much. Thank you sir!
@MrBowNaxe 4 months ago

Thanks for making this one! I'm in the same boat about not needing a 300 Win Mag but, I won one so here I am. I really enjoyed all your videos so far and I'm sure this one will serve me well.