Ballistics for 300 grain Hornady SST

[cherokee75]

I use a 300 grain T/C Shockwave (same bullet) with 2 Pyrodex pellets. Sighted in about 3 inches high at 100 yards puts me pretty much dead on at 150 yards. According to thesheet I have from Hornady:

300 gr SST has sec. density of .210, ballistic coefficient of .250.
With (2) 50 grain Pyrodex pellets here is what is listed:

Velocity(fps)Energy(fpe)Trajectory (150 YardZero)
Muzzle 100yds200ydsMuzzle 100 200 100150200
177015051284 20871509 1098 +3.1 0.00 -7.6

[gleason.chapman]

ORIGINAL: blackheel

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!

This may help:

http://www.hpmuzzleloading.com/Technical4.html and

http://www.hpmuzzleloading.com/Technical.html

Chap Gleason

[HuntAway]

ORIGINAL: blackheel

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!

Here's some that I shot a while back.

All were fired from a TC Omega, 209 Winchester primer, swabbed well between shots. Chrony was 20 feet from muzzle.

340 gr PR Dead Center, 110 gr ff T7 - 1696, 1702,1713. avg 1704

300 gr Nosler Partition, 100 gr ff T7 - 1761, 1732, 1751. avg 1748

300 gr Hornady SST, 100 gr ff T7 - 1745, 1774, 1756. avg 1758

300 gr Hornady SST, 2 T7 50 gr pellets, 1653

[dmurphy317]

Here is one of the loads I shoot in my Magbolt, 26" barrel with 130gr of Pyro pellets.


Name: 45 Cal, Hornady SST, 300 grn
Ballistic Coeff: 0.250
Bullet Weight: 300
Velocity: 1945
Target Distance: 158
Scope Height: 1.500
Temperature: 40
Altitude: 500
Ballistic Data
~~~~~~~~~~~~~~~
Range Elevation Velocity Energy ETA Drop Max Y 10mph Wind Deflect
0 yds -1.50 in1945 fps 2520 fpe 0.000 sec 0.00 in -1.50 in -0.00 in
25 yds 0.61 in 1869 fps 2326 fpe 0.039 sec 0.29 in -0.53 in 0.09 in
50 yds 2.09 in 1795 fps 2147 fpe 0.080 sec1.21 in -0.29 in 0.55 in
75 yds 2.89 in 1724 fps 1980 fpe 0.123 sec 2.82 in 0.14 in 1.33 in
100 yds 2.94 in 1655 fps1825 fpe 0.168 sec5.17 in 0.77 in 2.42 in
125 yds 2.21 in 1588 fps 1680 fpe 0.214 sec 8.30 in 1.63 in 3.79 in
150 yds 0.67 in 1523 fps 1545 fpe 0.262 sec12.24 in 2.74 in 5.41 in
175 yds-1.82 in 1461 fps 1421 fpe 0.312 sec 17.14 in 4.14 in 7.44 in
200 yds -5.36 in 1402 fps 1309 fpe 0.365 sec 23.08 in 5.86 in 9.88 in
225 yds-10.05 in 1347 fps 1208 fpe 0.420 sec 30.16 in 7.95 in12.75 in

Typical groups of around 1.5" at 100 yards and under 4" at 200 yards. Hope this helps.

[rem 700]

I think the actual BC of the 300gr SST is .240, not the advertised .250.

[dmurphy317]

Changing the BC from .250 to .240 only makes about a .1" difference at 200 yards on the load I listed. In my book thats not enough to worry about.

[rem 700]

Guess it's no big deal...at least not like in centerfires at long range