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300 g. SMK Terminal Performance

 
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  #22  
Old 03-04-2010, 10:17 PM
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Join Date: Mar 2002
Location: Wyoming
Posts: 2,615
Re: 300 g. SMK Terminal Performance

Try 7828 with the 250 grain. Start with the load your book lists and go up from there. My data over 40 years is far more extensive than the handbooks. I am listing top velocities you can acheive with most rifles without liability concerns they have to deal with. Most of there loads concerning weatherby cartridges in particular are not max with a freebore rifle. Many custom barrels are out there with no freebore in wby chamberings. So many max loads listed are not max if your rifle has freebore. You will gain 18-22 fps per inch of barrel with the 340 wby on average depending on the burn rate of the powder used.

I think the 340 wby and 338 win mags are best served with the 250 grain bullets at more than 300 fps faster than the 300 grain. Overall performance is better within the ranges these rifles are most capable. After a few hundred yards the 300 would catch up with it in velocity but the 250 shoots much flatter and will drop elk size game at beyond 1000 yards. If I was setting it up to shoot 1000 yards I would shoot the 300 grain. I am talking about most average hunting situations I feel the 250 would be a better choice.
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  #23  
Old 03-09-2010, 10:43 PM
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Join Date: Nov 2003
Location: Amarillo, Texas
Posts: 34
Re: 300 g. SMK Terminal Performance

It seems to me the 300 gr. Matchking expands faily rapidly, even in light game, as has been stated. Racing goats shot into the shoulder lose the other side, with a couple actually hanging on only by small amounts of skin. Hit thru the ribs game of that size is not damaged too much. Several goats hit at longer ranges (beyond 1000 yds) the bullets still expand quickly, sometimes sucking the lungs and/or heart out the exit wound. On elk at 650 yds much the same, with a ribs only hit, one cow pulled the liver out. One goat at about 1000 yds looking straight at me took a hit in the front of the chest, exited ahead of the hindquarter, then hit rear leg at about the knee joint. The jacket was in the hide on the first exit, so I assume that the core was what hit the rear leg and broke it. Gamekings in 250 gr. are also quick to expand, but I have only shot one deer with that load. The 200 gr matchking in .308 works well at about 2900 fps and has accounted for 9 elk and a good dose of antelope. One Matchking in an Idaho bull turn sideways and did not expand. All the rest did a good job, but wounds are not like a standard expanding bullets. I think with 300 grs. we just have plenty of bullet for most of the game we are shooting. What do you guys think??
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