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Heavy bullets now!

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Heavy bullets now!

Postby Grimstod » Thu Feb 20, 2014 5:38 pm

Ever wonder why you can't get better accuracy with light 147gr bullets.
I have said this before. We need heavier bullets for our mosins. The heaviest thing out there is 175 Sierr HPBT and see here just how far off it is on its Sg!
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A 200 grain would be better. But still not the best for accuracy.
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This one is best. And by the way the mosin was designed with a 220gr bullets from the beginning. Guess they knew what there were doing for accuracy's sake. Its probably just not ideal for long range cause it slow and wind sensitive at these slow speeds.
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Re: Heavy bullets now!

Postby Grimstod » Fri Feb 21, 2014 6:21 pm

Here is another calculator by McGowen. Their calculator states that a 1:13in twist is necisery for the HPBT Sierras that so many of us shoot. I typed the wrong value in for the bullet length. It should be 1.24in which gives you a 1:13.6 twist.
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Re: Heavy bullets now!

Postby ShootnMathews » Fri Feb 21, 2014 8:00 pm

I still wouldn't want to shoot those super heavy bullets long range. The drop would be incredible. I think the best solution on a custom build would be to just use a 1:13 twist .308" barrel. Plenty of high BC bullets in the 175 range then.

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Re: Heavy bullets now!

Postby Shepard » Fri Feb 21, 2014 9:37 pm

I'm going to load up a box of SMK 200 gr bullets that I have just to see how they run. There cheaper to load then the 175 gr SMKs.
51 gr of IMR 4350 yields 2350 FPS out of a 20 inch barrel according to my load book. Should be interesting out of a 26 inch barrel.
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Re: Heavy bullets now!

Postby ShootnMathews » Sat Feb 22, 2014 4:48 am

Let me know how hey do Jerry. My bore slugs at .3095" so I could prob shoot a heavy 308 pretty well. If you have good luck I may give they a try.
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