The .30 Newton fired the first magnum a century or so ago. The article shows 4 but I already had data on one of the lengths so I didn't need to do that one again.

Member Others I know who still shoot a .300 Win.

in awhile. When I found out Sierra was introducing .308″ diameter 195 grain Tipped MatchKings (TMK) I was thrilled to get my hands on some.

Also I deviated from the article in that instead of doing two 3 shot groups, I did one 5 shot group for each load.

method. ! (See note on Powders below or read all about various Powders.)

More testing to come to find the one she really likes.


I bought these bullets for hunting and I'm trying to develop an accurate load … 04-08-2013, 03:45 AM #9. lamezcua.

165 gr.

Sierra Bullets is excited to release load data for four of our newest bullets: the 22 caliber 95 gr HPBT MatchKing #1396, 6.5mm 150 gr HPBT MatchKing #1755, 30 caliber 200 gr HPBT MatchKing #2231, and 30 caliber 230 gr HPBT MatchKing #2251.. Enter your email address to follow the Sierra Bullet's blog and receive notifications of new posts by email. Over the past year I have been chasing down load data from this and several other good reloading sites looking for the best powder and bullet recommendations for my 300 Win. Back when I hunted with smokeless powder rifles I used a 300 WM frequently and my go to load for that rifle is a 180 gr. Posts about 300 Win Mag written by Sierra Bullets.

Some of the brass for my 300 Win mag, 308 Norma mag and 8mm Rem mag (all belted magnum cases) have been reloaded up to 20 times.

DETAIL SPECIFICATION CARTRIDGE, .300 WINCHESTER MAGNUM MATCH, MK 248 MOD 1 DODIC AB43, NSN 1305-01-568-7504 Revision A 17 March 2009 Supersedes DS/JXNN/C08/1604 of 31 October 2008 DISTRIBUTION STATEMENT A. New Official Load Data for Latest High-BC Sierra MatchKings. Beneficial comments (recommendations, additions, deletions) and Share.

The listed maximum loads should never be Based on the article, I loaded up 3 loads for my 300 win mag. Member .300 Winchester Magnum Handloading Data reloading data with 320 loads. All the loads on these pages are pressure tested according to the C.I.P.

charge weight in grams and grains as well as muzzle velocity in meters and feet per second.

.300 Winchester Magnum (175 & 180 GR Sierra Data - Edition V) Warning!

The weight was an interesting choice, heavy for a 308 Winchester (Win) and light for a 300 Winchester Magnum (Win Mag).

For example, a certain powder type can act slightly quicker than some other powder type, when used in 308 Winchester loads; however, when these powders are used in 7x64 loads… HPBT168 gr.

300 Winchester Magnum uggested ullet se Suggested Bullet Use Suggested Bullet Use 150-grain TTSX BT Sectional Density .226 Ballistic Coefficient .420 C.O.A.L 3.340” Maximum Loads Should Be Used With Caution - Always Start With Minimum Loads. Could ... Winchester post 65 model 70 hart heavy varmint taper barrel chambered in .300 win mag glass bedded in a fajen laminate thumbhole stock 300 win mag 190 grain matchking load. 300 WM is a favorite cartridge of mine. Rifle reloading For flexible usage, we provide our reloading data in metric and imperial dimension systems, i.e.

Another 300 WM I had was for long range target work and it liked a 190 gr. I am quite sure that the new RL powders, like RL-23 and RL-26 should work very well too. To 220gr.

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