100 gr. verse 150 gr.
 

i've got a black diamond in 50 cal. i use 180 grain hornady xtp sabots. i've got it sighted in out to 100 yards with 100 grains of pyrodex pellets. if i were to use 150 grains, what would be the change in impact at 25,50,75, and 100 yards. i'm going hunting in about an hour and half and i don't have time to shoot it to see. thanks for your advice.

jeff greene

Edited by - beretta390 on 10/13/2002 13:01:24

RE: 100 gr. verse 150 gr.
 

Since ALL GUNS ARE DIFFERENT, the only way you can find this out is by shooting the one you have!!

Keep yore powder dry!!

RE: 100 gr. verse 150 gr.
 

I'd expect it to hit a little higher than the 100 grain load at 50-100 yards. There is a really nifty ballistic calculator at www.handloads.com . You have to know the ballistic coefficient of the bullet you're using (most manufacturers give this data, but the bc calculator will also provide a rough estimate). It'll spit out a spreadsheet with balistic info out to whatever range you specify.

Here is an example of the load I use for my Knight:

Range Velocity Impact Drop ToF Energy Drift
0 1950 -1.5 0 0 1984 0
10 1925 -0.9 0.08 0.02 1934 0
20 1904 -0.4 0.25 0.03 1892 0
30 1883 0.01 0.52 0.05 1850 0
40 1862 0.33 0.88 0.07 1809 0
50 1841 0.54 1.35 0.08 1769 0
60 1820 0.64 1.92 0.1 1729 0
70 1800 0.65 2.59 0.11 1691 0
80 1779 0.54 3.38 0.13 1652 0
90 1759 0.33 4.27 0.15 1615 0
100 1739 0 5.27 0.17 1578 0
110 1719 -0.45 6.4 0.18 1542 0
120 1700 -1 7.63 0.2 1508 0
130 1680 -1.68 8.99 0.22 1473 0
140 1661 -2.5 10.48 0.24 1440 0
150 1642 -3.43 12.09 0.25 1407 0
160 1623 -4.48 13.82 0.27 1375 0
170 1604 -5.68 15.7 0.29 1343 0
180 1586 -7.01 17.7 0.31 1313 0
190 1567 -8.48 19.85 0.33 1281 0
200 1549 -10.08 22.13 0.35 1252 0

Of course, this is just an estimate of actual balistic performance, so you really need to shoot the rifle to get the actual ballistics down. I used the above chart to get my 100 yard zero close while shooting at 30 yards. I can tell by the chart that rifle should be very close to zero at 100 yards if zeroed at 30, without having to waste a bunch of shots just trying to get it on paper.

Mike



Gun control means putting the second bullet through the same hole as the first- Ted Nugent
NRA Member
Muzzleloading- Once you go black, you'll never go back!!

RE: 100 gr. verse 150 gr.
 

Jeff,

based on what I've seen with my Knight in-line, I would say the 50gr increase in powder should raise the bullet up to 3 inches.

However, I would also expect your accuracy to drop fairly drastically with that charge. With a fast twist barrel, it is easy to over-spin lighter bullets and sent then flying into places you don't want them to go. My gun's max charge is 120gr and I reserve that load for 400gr PR sabots; 350gr sabots get between 100 & 110gr; 300gr sabots get around 90gr; and any bullet smaller than that gets used as a fishing weight because my gun just don't like 'em.


"Every moving thing that liveth, I give unto you as meat" (Gen 9:3)

Trust God..........but keep your powder dry!

RE: 100 gr. verse 150 gr.
 

But in order to develop this ballistic chart, you have to know what your muzzle velocity is, from YOUR rifle, by use of a chronograph, OR, you must shoot YOUR gun at each of the ranges involved, if you have no chronograph. If you are just guessing at the muzzle velocity, then your ballistics chart is just a bunch of guesses, too! When you're aiming at thet trophy buck or bull elk is a poor time to discover you guessed wrong!!

Keep yore powder dry!!

RE: 100 gr. verse 150 gr.
 

I wouldn't change my load until I had a chance to test it at the range.