I live in florida and have shot out to 200 yards with my sharps,Have loads that do well at that distance,Im going to michigan this summer and will be shooting a long range match there ,I wont beable to shoot much at long range until i go maybe twice if im lucky,Any help on sight adjustments would be helpful.I think ill be going to 1000 yds,I dont plan on hitting alot,But would like a shot at hitting a few lol.Im shooting a 4590 1874 shiloh,im using the moony bullet and creedmore right now,Should i try to get any certain velocity for the long haul??I have axcess to a chrony for a few weeks.

Jeff, I am not sure how many long range shooters there are on here, but on the shiloh board, (You need to Login or Register to view media files and links), and the historic shooting forum, (You need to Login or Register to view media files and links) there are some long range shooters that could give you some good info on sight settings. The may not be exact but they will come pretty close. If need be I can dig out my sight settings for silhouette that would give you a place to start out to 600m or so.
Sam

Jeff, do you have access to a chronograph?  I've used the JBM Ballistics software ( free online ) with a .500 BC for a BACO Money bullet at 1350fps to estimate sight settings for my .45-110 out to 800m.  It was reasonably close up until 600 yards and after that the software predicted more drop than I was seeing.  

Interestingly there is a simple technique that was a little closer for me.  Check out Montana Charlie's post on bpcr.net.  It's actually a repost from Dan Theodore.

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Let me know if you cannot access the web site and I'll pm you the details.  My come ups from 500m to 600m are 16 minutes, then 17 minutes from 600m to 700m, and then 18 minutes from 700m to 800m, so Dan's technique seems pretty close.

Chris.

Thanks for all the info,I have a long range soul mva sight on the 4590 it has the large adjustable aperature,That should be fine shouldnt it?

time it right for a vacation trip, and you could swing by Etna Green the weekend before Memorial day for the big Spring Shoot if I remember right.

If you are only shooting 200 yards before you go, make sure the rear sight is angled a fuzz to the right to compensate for the right hand twist of the rifling.  I used a torpedo level and put the bubble against the line just off plumb.  My windage always tracked dead on from 200 to 1,000 yds.  That worked on several different rifles.

I have seen new guys show up with a rear sight the was straight or in one case leaned a fuzz to the left.  You can run out of windage really fast a lot shorter than 1000 yds

Interesting chart.  First time I have seen the actual calculations. 

What is the range of the BC of the long range bullets being used today? 

Back in the 90s I used .5 for everyone.  I calculated 1000 yd sight setting for lots of guys who had never shot beyond 5 or 600 yds.  When we went to KD22 at Fort Lewis, they were all right on except for one guy.  I wondered if he was giving me bogus input for the calcs. The results didn't look reasonable  and he was nowhere near the target with the settings calculated.  

 

gunlaker wrote on Dec 27^th, 2014 at 8:11pm:


Might be those slick sides on the PP helping a little ? 

I corresponded with Dr. Richard Gunn about 15 years ago.  He was a premier long range bullet expert at that time. He said the Creedmoore bullet design of the late 19th century were optimum for LR BPCR. 

I used pre-Windows Olher Ballistic Explorer.  I'm sure the newer programs are much more sophisticated and the power of the processors has increase exponentially. 

I couldn't find any BC info for lead bullets.  When I started I shot over the chrony at the muzzle and again at 50 yds to calculate the starting BCs. Subtle changes in the nose design didn't seem to matter much.