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Sierra 6mm 85 gr HPBT

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  #8  
Unread 02-21-2006, 12:33 PM
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Re: Sierra 6mm 85 gr HPBT

Just a side note with the Sierra 85 gr HPBTs, I shoot 44.5 gr H414 with those bullets and get 3204 fps out of my Sako 243 Win. The same charge with NPs gives me 3422 fps. I tried other powders and seating depths, but I could never get the velocity up to where I wanted it to be.

I am now playing with some 90 gr Scenars, Bergers and shortly some NBTs. I am not saying the bullets will not work, but I have not had as good a luck with those particular bullets as I have other makes and models. If you have them, shoot them; however, you will need to avoid the shoulder bustin shots. jm2c
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  •   #9  
    Unread 02-21-2006, 12:40 PM
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    Re: Sierra 6mm 85 gr HPBT

    I was mistaken . . . the bullets that do not perform well for me are the 85 gr Varminters Sierra makes. The 85 gr HPBTs are SGKs and shoot lights out. Sorry for the confusion.
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      #10  
    Unread 02-21-2006, 05:52 PM
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    Re: Sierra 6mm 85 gr HPBT

    I have shot 8 deer with the 85 hpbt sierra bullets. All but one fell within 3 steps the other went about 10. When opening all of the animals it looked asif a bomb went off in their chests. You couldn't make out heart or lungs, just jello. I love them with 37.5 varget. .247" groups too at 100 yards.
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      #11  
    Unread 02-21-2006, 07:34 PM
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    Re: Sierra 6mm 85 gr HPBT

    Pop, Sierra has told me that the 85 gr HPBT was originally designed for up to deer sized game. I've used it on antelope with great success. On coyotes & chucks, it really works well also. Good luck.
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      #12  
    Unread 05-09-2013, 11:36 AM
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    Re: Sierra 6mm 85 gr HPBT

    They are extremely accurate with Varget. 36 - 37 gr. yields about 2980 - 3040fps. Quite capable of 1" 3 shot groups at 300 yards even with a little breeze. I shoot the small Crystal Geyser water bottles at 300 - 400 yards and once I get the wind reading, they explode. Standard Xbolt w/ 22" barrel.
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      #13  
    Unread 05-09-2013, 07:14 PM
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    Re: Sierra 6mm 85 gr HPBT

    I have shot quite a few antelope and a mature muley buck with them from my 6mm284. IIRC, my older Sierra manual says to run them up to 3300 fps, but I am running them at closer to 3400. They have a tendency to explode, splash and do some otherwise unpredictable stuff. I am guessing it is due to the velocity.

    In one instance I shot an antelope doe right behind the shoulder, broadside. The bullet blew up so bad it punctured the gut cavity and made a disgusting mess of the inside.

    I had another antelope that was slightly quartered towards me at 360 yards. I hit it in the near shoulder. A large piece of the bullet somehow made a turn and slid right down the spine, wrecking the backstraps.

    On the muley buck the bullet splashed on the ribs right behind the shoulder. At first I thought I lost a lot of meat, but it turns out that the blood clots traveled between the meat layers clear up and over the back and part way down the other side.

    On coyotes I have had some stellar results, but also a mess or two. At the velocity I am at the damage is pretty severe at times.

    My opinion is that in a WSSM you should load them to run slower to get good results. I hear of tons of reports of guys using them in a .243 Win with satisfactory results. If you wanna use the full velocity potential of your cartridge, I would recommend a more heavily constructed bullet for dual purpose use.
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      #14  
    Unread 05-09-2013, 09:55 PM
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    Re: Sierra 6mm 85 gr HPBT

    Dang it.... I gotta learn to check the dates on these things.
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