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Ballistics for 300 grain Hornady SST

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Ballistics for 300 grain Hornady SST

Old 08-14-2007, 08:12 AM
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Fork Horn
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Default Ballistics for 300 grain Hornady SST

Does anyone have some approximate ballistics for the 300 grain Hornady SST? I know m/l ballistics are very variable because of primers, types of powder, length of barrel, etc but I am looking for something approximate. My gun range has no way to shoot more than 100 yards so I have no real way to see what will happen out to 125-150-200. I looked at the Dead Center bullet in 300 grain on their website and with 110 grains of ffg T7 they show 5.4" high @ 100 is dead on at 200. I doubt that will hold true with the Hornady bullet. Any help would be appreciated!
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Old 08-14-2007, 08:59 AM
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Default RE: Ballistics for 300 grain Hornady SST

blackheel

I do not have a sheet on the SST, but i do have one on the Speer Gold Dot. The Gold Dot does have a decent BC but it will not match that of a SST so the Gold Dot's trajectory will deterioratefaster than the SST. The other thing is I am only shooting 100/110 graions of loose T7-2f so my muzzle velocity shows up about 1750 fps. This might give you some idea though....

It is sighted in to be 2.4" inches high @ 100..




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Old 08-14-2007, 09:33 AM
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Fork Horn
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Default RE: Ballistics for 300 grain Hornady SST

Thanks! Maybe a good guessimate would be an average between your ballistics and the Dead Center, one with a lower BC and one with a higher?
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Old 08-14-2007, 10:10 AM
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Default RE: Ballistics for 300 grain Hornady SST

The 300 grain Hornady SST has a sectional density of .210, a Ballistic coefficient of .250, and diameter of .452. With an average 100 grain load you will get a velocity of 1735 fps according to my charts. So you can plug all of that into a ballistic calculator and then start to figure ranges from there.

Here is a ballistics calculator for you to work over.. http://biggameinfo.com/BalCalc.aspx
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Old 08-14-2007, 10:25 AM
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Default RE: Ballistics for 300 grain Hornady SST

cayugad

The 300 grain Hornady SST has a sectional density of .210, a Ballistic coefficient of .250, and diameter of .452. With an average 100 grain load you will get a velocity of 1735 fps according to my charts.
Now those are some interesting numbers - I really thought the SST would have a higher BC.... The Gold Dot, which IMO is a better bullet across all ranges is not that far behind.

I am sure the PR Bullet will list their bullet with a much higher BC as they normally do.
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Old 08-14-2007, 10:37 AM
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Default RE: Ballistics for 300 grain Hornady SST

the numbers were taken right off the Hornady web site. You can look up any Hornady bullet on there and get the BC & SD for it.
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Old 08-14-2007, 11:22 AM
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Default RE: Ballistics for 300 grain Hornady SST

cayugad

yep! knew that, but i just never had any interest in the SST's

thanks
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Old 08-14-2007, 11:34 AM
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Default RE: Ballistics for 300 grain Hornady SST

the paper that came with the sst's i bought shows, 2 pyrodex pellets " 100 grains" 300 gr sst will be + 3.1" high @ 100, 0.00" @ 150 and -7.6" low @ 200. Aim at the top of the back and its going down.
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Old 08-14-2007, 01:43 PM
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Fork Horn
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Default RE: Ballistics for 300 grain Hornady SST

Thanks! This has been helpful.

Question-has anyone played with velocities of T7 or other powders to see how much a 10 grain increase increases velocity?

Just food for thought - the Dead Center .44 300 grain bullet is listed with a BC of .371 and with 110 grains of ffg T7 they say they are getting 1880 f/s out of the barrel on their website.


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Old 08-14-2007, 02:16 PM
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Default RE: Ballistics for 300 grain Hornady SST

blackheel

One of the factors for BC's of bullets isvelocity. There is no doubt that at some velocity that the BC of the PR bullet could be that high. Somevery learned people have stated in most cases that PR overated their bullets BC in the avearge ML.

Near 1900fps with a 110 grains of T7 seems high to me, but I certainly am not saying it is impossible. Another thought - if you are shooting an all lead bullet at that velocity - I would think that it might have a tendancy to blow-up if it were to strike somrthing solid...


I shoot 110 grains of T7 with 10mm 200 grain Hornady XTP's and average about 2100 fps, 110 grains of T7 with a 250 grain Speer - I am getting 1860 fps.

10 grain powder boosts will make a difference but as you near the peak the amount of increase declines... so like going from 60 to 70 grains you may record a significant boost... but going from 100 to 110 the boost will not be as great.

Here is an A&H target with some example velocities... My A&H was my test gun for several years...





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