Im shooting a Sako A7 300 Wsm. Ive got the Rock Chucker supreme kit on the way from Midway right now along with the latest nosler reloading book. Reloading Tips. I've got some 165 TTSX & 180 TTSX's. i found peak accuracy at a little higher than the now listed max loads. yeah, 300 wsm. Im very new to reloading but have been reloading for my 300 wsm maybe a year. Has not Winchester been saying that all along and yet people pooh pooh it. The “more efficient” short fat WSM case is just a bunch of advertising hype. A few of my favorite hunting loads in my 26" PacNor barreled Win M70 are: All of my 300 WSM loads use Norma cases. For highly efficient and consistent powder burning, the .300 WSM has a short-fat powder column geometry, a concept revered by accuracy-obsessed benchrest shooters for nearly three decades. www.hodgdon.com lists Win WLRM for all their loads in the 300 WSM. I'm looking to get back into a 300 WSM and noticed that after looking at Hodgdon's data Varget, H 4895, IMR 4166 and IMR 8208 would also be excellent for lighter 300 WSM loads. Witness the success of the Federal High Energy and Hornady Magnum loads, which operate at the same higher pressure level of the .300 WSM, and beat it by over 100 fps. Who wants to lug around a 28 inch long barreled rifle when hunting , climbing, or thick vegetation. The .300 Win Mag can be loaded to the same level, as the rifles are of the same strength. In closing, the .300 WSM offers about 250 fps more velocity than a .30-06 and 100 fps less velocity than a .300 Win mag but is about .5 inches shorter. This load data is from the RL web site for RL 17 300 WSM 180 gr BTSP Fed Fed 215 2.800 66.0 3082 300 WM 180 gr BTSP Fed Fed 215 3.340 70.5 3074 Don't you find it interesting that the 300 WSM list a higher speed than the 300 Win Mag yet uses 4.5 grains less powder. The .300 WSM, an original Winchester design, fits handily into bolt-actions sized for a cartridge length of 2.860 inches. i won't mention powder charge, but i started loading for the 300 before there was much information out for loading, so i just kinda worked a load up. He's interested in the 180's but I'd be curious if anyone has some 165 loads that they have had success with. Maybe I will in the future but not right now. We will also cover the 270WSM necked up to 7mm, as this is used by many long-range shooters. I do not hand load, I repeat I do NOT hand load unfortunately. I picked the .300wsm out of the 3 he is working on (7mm saum, 6.5prc, and 300wsm). I think that you have gotten good info from the other posters, and my take is to use magnum primers with ball powder, and standard primers in extruded powder loads, pretty much like JimKirk mentioned. Picked the .300 mainly because it is the heaviest out of the 3 and the most readily available stock ammo by far out of the 3. 5. We are very interested in knowing what kind of brass prep you've found to work best, both with Winchester and Norma brass. If you have developed any special loading practices that work real well with the 300WSM or 7mm WSM, let us know. Maybe thats common knowledge or maybe Im doing something wrong but it drove me crazy for a while trying to figure out why necks were splitting on the 2nd reload. The RL 15 load is a great load for anyone but especially for a younger hunter as it had a lot less felt recoil. Helping a buddy out with the move from lead to copper and will be working up some loads for his 300 WSM. all the 300 wsm's i've worked on have responded very well w/ rl-19 and 180 sierra gamekings. That said, if you have a supply of magnum primers, then using a start load of IMR4831 with magnum … It's a Tikka T3 Lite. I found that i need to anneal the brass often to avoid splitting the necks. 4. 200 ELD-X @ .020" off 69.3 grains RL26 CCI 250 3010 fps 200 Accubond @ 2.314" BTO 62.1 grains RL16 CCI 250 2900 fps This one is the most stable across all temps. Ive been shooting factory 180 grn accubonds out of it with great success in both accuracy and performance on game so I want to stick with that bullet. Most recently, the .30 Nosler and .300 PRC are very promising versions that in my humble opinion have the potential to supplant it, but as of this writing the .300 Winchester Magnum is still by far the most popular. A few examples include the .300 Remington Ultra Magnum, .300 WSM, .300 RSAUM, .300 RCM, .30-378 Weatherby Magnum and several others. H4350 can be used as a substitute.

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