50 cal. Ballistics
07-22-2008, 08:15 PM
#1
Thread Starter
Join Date: Oct 2007
Location:
Posts: 17
50 cal. Ballistics
Hello everyone. I just want to start by saying that I have been reading this forum for a while now but I don't make any posts so I guess you could say I'm new.
This past spring I decided it was time to get serious about my ML. After, some bad experiences in the past (mostly due to bad advice) I decided to start from a clean slate. Thats when I found this forum. Man I've learned alot since then.
Anyway, Ihadzeroed in the new omega at 50yds and decided to see how much it dropped at 100. First shot was actually 2"s high. I thought "this can't be right" so I shot again. Same thing. About 1.5"s to the right but it was still 2"s high. Is the bullet still rising at 100yds or do I have a problem?
I was shooting a .452 250gr gold dot, 2 50gr 777 pellets, knight high pressure sabots, and win 777 primers.
This past spring I decided it was time to get serious about my ML. After, some bad experiences in the past (mostly due to bad advice) I decided to start from a clean slate. Thats when I found this forum. Man I've learned alot since then.
Anyway, Ihadzeroed in the new omega at 50yds and decided to see how much it dropped at 100. First shot was actually 2"s high. I thought "this can't be right" so I shot again. Same thing. About 1.5"s to the right but it was still 2"s high. Is the bullet still rising at 100yds or do I have a problem?
I was shooting a .452 250gr gold dot, 2 50gr 777 pellets, knight high pressure sabots, and win 777 primers.
07-22-2008, 08:23 PM
#2
Nontypical Buck
Join Date: Nov 2005
Location: Illinois
Posts: 1,482
RE: 50 cal. Ballistics
Don't worry, there's no problem. I'm not a ballistics expert, but every load that I shoot is higher at 100 yards than 50. For example, here are the ballistics for the load I've been using recently. It's not the same as your load, but it will give you an idea.
200 grain XTP with 100 grains 777
50 yards = 1.5" high
100 yards = 2.2" high
After 100 yards, it starts to drop
It is dead on at 150 yards, and 6" low at 200 yards.
200 grain XTP with 100 grains 777
50 yards = 1.5" high
100 yards = 2.2" high
After 100 yards, it starts to drop
It is dead on at 150 yards, and 6" low at 200 yards.
07-22-2008, 09:22 PM
#4
Dominant Buck
Join Date: Feb 2003
Location: Wisconsin
Posts: 21,193
RE: 50 cal. Ballistics
Welcome to the forum.
What you're experiencing could be because of the type of bullet and the powder charge.. At least you are smart enough to test the bullet at the different distances. 2" high at 100 yards is not the end of the world. For instance if you were shooting conicals, that probably would not be happening. If it bothers you, take the average shot you will encounter and sight in at that distance. Then learn the other distances you might encounter.
Good luck with your rifle. That is a great rifle you have there.
What you're experiencing could be because of the type of bullet and the powder charge.. At least you are smart enough to test the bullet at the different distances. 2" high at 100 yards is not the end of the world. For instance if you were shooting conicals, that probably would not be happening. If it bothers you, take the average shot you will encounter and sight in at that distance. Then learn the other distances you might encounter.
Good luck with your rifle. That is a great rifle you have there.
07-22-2008, 09:47 PM
#5
Giant Nontypical
Join Date: Nov 2005
Posts: 6,585
RE: 50 cal. Ballistics
SC Sportsman
Welcome to our group.
So far it sonds like mabe a little more shooting and finding a good grouping load you have confidence in is all thats needed. Lee
Welcome to our group.
So far it sonds like mabe a little more shooting and finding a good grouping load you have confidence in is all thats needed. Lee
07-23-2008, 12:13 PM
#6
Thread Starter
Join Date: Oct 2007
Location:
Posts: 17
RE: 50 cal. Ballistics
Thanks guys. I sighted the rifle in at 50yds because thats about the farthest shot I will ever get. Iwanted to check it at 100yds just in case.
I plan on trying several different sabots to see which will give me the best groups. So far I have bought some crush ribs, hph 24, and 3-petal EZs. Should I shoot 3 or 5 shot groups to do the comparison? Also, how long should I let the barrel cool between groups.
I plan on trying several different sabots to see which will give me the best groups. So far I have bought some crush ribs, hph 24, and 3-petal EZs. Should I shoot 3 or 5 shot groups to do the comparison? Also, how long should I let the barrel cool between groups.
07-23-2008, 03:51 PM
#8
Nontypical Buck
Join Date: Dec 2005
Location:
Posts: 3,246
RE: 50 cal. Ballistics
ORIGINAL: SC Sportsman
Thanks guys. I sighted the rifle in at 50yds because thats about the farthest shot I will ever get. Iwanted to check it at 100yds just in case.
I plan on trying several different sabots to see which will give me the best groups. So far I have bought some crush ribs, hph 24, and 3-petal EZs. Should I shoot 3 or 5 shot groups to do the comparison? Also, how long should I let the barrel cool between groups.
Thanks guys. I sighted the rifle in at 50yds because thats about the farthest shot I will ever get. Iwanted to check it at 100yds just in case.
I plan on trying several different sabots to see which will give me the best groups. So far I have bought some crush ribs, hph 24, and 3-petal EZs. Should I shoot 3 or 5 shot groups to do the comparison? Also, how long should I let the barrel cool between groups.
Chap Gleason
07-23-2008, 04:00 PM
#9
Nontypical Buck
Join Date: Dec 2005
Location:
Posts: 3,246
RE: 50 cal. Ballistics
ORIGINAL: SC Sportsman
Hello everyone. I just want to start by saying that I have been reading this forum for a while now but I don't make any posts so I guess you could say I'm new.
This past spring I decided it was time to get serious about my ML. After, some bad experiences in the past (mostly due to bad advice) I decided to start from a clean slate. Thats when I found this forum. Man I've learned alot since then.
Anyway, Ihadzeroed in the new omega at 50yds and decided to see how much it dropped at 100. First shot was actually 2"s high. I thought "this can't be right" so I shot again. Same thing. About 1.5"s to the right but it was still 2"s high. Is the bullet still rising at 100yds or do I have a problem?
I was shooting a .452 250gr gold dot, 2 50gr 777 pellets, knight high pressure sabots, and win 777 primers.
Hello everyone. I just want to start by saying that I have been reading this forum for a while now but I don't make any posts so I guess you could say I'm new.
This past spring I decided it was time to get serious about my ML. After, some bad experiences in the past (mostly due to bad advice) I decided to start from a clean slate. Thats when I found this forum. Man I've learned alot since then.
Anyway, Ihadzeroed in the new omega at 50yds and decided to see how much it dropped at 100. First shot was actually 2"s high. I thought "this can't be right" so I shot again. Same thing. About 1.5"s to the right but it was still 2"s high. Is the bullet still rising at 100yds or do I have a problem?
I was shooting a .452 250gr gold dot, 2 50gr 777 pellets, knight high pressure sabots, and win 777 primers.
Best Wishes with your new rifle,
Chap Gleason
07-23-2008, 04:11 PM
#10
Nontypical Buck
Join Date: Dec 2005
Location:
Posts: 3,246
RE: 50 cal. Ballistics
ORIGINAL: SC Sportsman
Hello everyone. I just want to start by saying that I have been reading this forum for a while now but I don't make any posts so I guess you could say I'm new.
This past spring I decided it was time to get serious about my ML. After, some bad experiences in the past (mostly due to bad advice) I decided to start from a clean slate. Thats when I found this forum. Man I've learned alot since then.
Anyway, Ihadzeroed in the new omega at 50yds and decided to see how much it dropped at 100. First shot was actually 2"s high. I thought "this can't be right" so I shot again. Same thing. About 1.5"s to the right but it was still 2"s high. Is the bullet still rising at 100yds or do I have a problem?
I was shooting a .452 250gr gold dot, 2 50gr 777 pellets, knight high pressure sabots, and win 777 primers.
Hello everyone. I just want to start by saying that I have been reading this forum for a while now but I don't make any posts so I guess you could say I'm new.
This past spring I decided it was time to get serious about my ML. After, some bad experiences in the past (mostly due to bad advice) I decided to start from a clean slate. Thats when I found this forum. Man I've learned alot since then.
Anyway, Ihadzeroed in the new omega at 50yds and decided to see how much it dropped at 100. First shot was actually 2"s high. I thought "this can't be right" so I shot again. Same thing. About 1.5"s to the right but it was still 2"s high. Is the bullet still rising at 100yds or do I have a problem?
I was shooting a .452 250gr gold dot, 2 50gr 777 pellets, knight high pressure sabots, and win 777 primers.
and found this:
File Format: PDF/Adobe Acrobat - View as HTML
ballistic coefficient of .145 and a sectional density. of .140. .... 300-grain XTP MAG, Speer 300-. grain Gold Dot HP (designed for ...
www.riflemagazine.com/magazine/PDF/HL%20242%20Partial%20(LO).pdf - Similar pages
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so the BC is .145 of a Speer Gold dot but that is a 300g, and your shooting 250, so yours is going to be a bit less. I then looked up MV for 250g bullet with 2 50g pellets and it averaged 1725. Dropped those into here:
http://www.sav10ml.com/pages/load_data/traj_basic_dat.html
with BC of .145, 1725 MV, 250g bullet, sight in 50 yards, here is your ballistics chart.
My opinion, your not letting the arc of the bullet work for you, need to further sight in as I explained in another post. Chap