Long range load development at 100 yards.

[6BRinNZ]

I have had noticeable horizontal stringing with a tuner seating or a seating depth setting. With the tuner setting the stringing was quite wide like you have, with seating depth they were much closer (touching). The seating depth was interesting as it was part of a series of seating depths and the horizontal string was just one shape of several that formed as I went through the different depths.

 

[300 RUM]

I have had noticeable horizontal stringing with a tuner seating or a seating depth setting. With the tuner setting the stringing was quite wide like you have, with seating depth they were much closer (touching). The seating depth was interesting as it was part of a series of seating depths and the horizontal string was just one shape of several that formed as I went through the different depths.

well like I said I've shot this load many of times with good success but I keep coming out with these horizontal strings every now and then. I have made many attempts of adjusting powder and seating depth to always come back to the same particular load and at times the majority it will produce under quarter minute groups I can only assume that it's me the shooter causing the string what am i doing that causes the string

 

[6BRinNZ]

I have had noticeable horizontal stringing with a tuner seating or a seating depth setting. With the tuner setting the stringing was quite wide like you have, with seating depth they were much closer (touching). The seating depth was interesting as it was part of a series of seating depths and the horizontal string was just one shape of several that formed as I went through the different depths.

well like I said I've shot this load many of times with good success but I keep coming out with these horizontal strings every now and then. I have made many attempts of adjusting powder and seating depth to always come back to the same particular load and at times the majority it will produce under quarter minute groups I can only assume that it's me the shooter causing the string what am i doing that causes the string

I see - probably need to start a new thread for that specific question.

 

[300 RUM]

there is a lot to read here some of It gets lost in translation so I'm just gonna ask the questions at what point does the ES start to show up at 100 yards when going bad maybe even does a high es even show up at 100 yards

 

[Steve Blair]

ES will generally not show at 100 yards. But, the name of the thread is "Long range load development at 100 yards", not "100 yard load development at 100 yards". Get an accurate, reliable chronograph and use it.

 

[300 RUM]

ES will generally not show at 100 yards. But, the name of the thread is "Long range load development at 100 yards", not "100 yard load development at 100 yards". Get an accurate, reliable chronograph and use it.

I have a chronograph and I use it I didn't see any elevation change from loads shooting a 9 yes to a 25 year at 100 so I asked the question is why is that a problem to you

 

[Steve Blair]

It is certainly not my problem. I understand the relationship of ES to long range elevation. Try entering your load into a ballistics program and vary the velocity by 50 fps. Look at the 100 yard elevation change and you'll understand why you can't see it.

 

[6BRinNZ]

there is a lot to read here some of It gets lost in translation so I'm just gonna ask the questions at what point does the ES start to show up at 100 yards when going bad maybe even does a high es even show up at 100 yards

The main takeaway I have with ES numbers when developing a long range load at 100 yds - the numbers are an influence for choices (do I stick with this powder, primer- do I have small ES and a flattening of POI between charges) but not an influence on target.

 

[Erik Cortina]

If a load does not yield a window with low ES, something needs to change. Things to change are neck tension, primer, and powder type.

 

[Erik Cortina]

Erik, finally got back to my 22-250 shooting 55 Blitzkings with one consistent charge of 35.9 Varget and Fed210 Gold Medal Match primers. Following your advice, I started the bidding at .005 off (top left, 2.118 comp which is approximately 2.512 OAL), where this was my ONLY 4-shot group of the evening. The rest are all just 3-shot groups. I went from top left to right, moving downward and right, working further and further away from my rifling.

I think I can safely say the 2nd row is out. To me, the 3rd row may hold the most promise in terms of any patterns, where 2.105 comp which is approximately 2.503 OAL or about .018 off... looks to be my best of the evening. Before this thread I might have picked one of the bottom two groups, probably bottom right because I've always heard it is better to have horizontal spread rather than verticle stringing. But this is where I need your expert opinion on where to go from here.

Should I go back to .020 off and re-test my charge (maybe go 35.8, 36.0, 36.1, .3, .5), should I try say .016 - .019 with the same 35.9 again, should I work out beyond .028 off... just continuing the seating depth experimentation with the same consistent 35.9 grain charge - what?

I can't read target but third row is what looks the best to me as well. Load longest of the two and re-test powder charge .5 gr. on each side of charge in .1 increments and see how it looks.

 

[Erik Cortina]

there is a lot to read here some of It gets lost in translation so I'm just gonna ask the questions at what point does the ES start to show up at 100 yards when going bad maybe even does a high es even show up at 100 yards

High ES does not shot up at 100 yards. Some loads with really high ES shoot great at 100 yards and it will make you chase your tail when shooting long range. For long range accuracy, ES must be low, and only a reliable chronograph can help you with that.

 

[sbranden]

Great, thanks. I'm thinking 35.8, 35.9 (again), 36.0, 36.1, 36.2, 36.3, 36.4 and 36.5, since I only did 36.0 and 36.2 once previously. Might find pressure before I get all the way up to 36.5. But I'll do something like this, going with the new ".018 off" seating depth now Erik. Appreciate the good advice.

 

[daniel brothers]

I've been following this thread and have been working up a load in my new 22-243 AI, for long range coyotes, with Horny 80 Amax bullets and Retumbo powder, and got her shooting groups that are all touching each other in clover leafs... BUT.... when I went to another bag of bullets, they shot bigger scattered one inch groups. I knew there was a problem, so I bought a Horny Comparator to check the bullet bases to the ogive, and found them to vary from .613-.642... what a mess. No wonder it shot all over the place... my seating depth was not consistent after I went to another box of bullets. Now I have to check every bullet before they get loaded....wow.... what a pain. I had a couple of bullets from the first bag and they were around the .636 area.

My TIP to all of you guys that are trying this load work-up system... which is GREAT... is to check the ogive to base of every bullet so that your seating depth will be correct... and you'lll have more hair in your head when it's all over.

 

[Raythemanroe]

I've been following this thread and have been working up a load in my new 22-243 AI, for long range coyotes, with Horny 80 Amax bullets and Retumbo powder, and got her shooting groups that are all touching each other in clover leafs... BUT.... when I went to another bag of bullets, they shot bigger scattered one inch groups. I knew there was a problem, so I bought a Horny Comparator to check the bullet bases to the ogive, and found them to vary from .613-.642... what a mess. No wonder it shot all over the place... my seating depth was not consistent after I went to another box of bullets. Now I have to check every bullet before they get loaded....wow.... what a pain. I had a couple of bullets from the first bag and they were around the .636 area.

My TIP to all of you guys that are trying this load work-up system... which is GREAT... is to check the ogive to base of every bullet so that your seating depth will be correct... and you'lll have more hair in your head when it's all over.

Hornady's shoot if you sort them.. I use the BTHP's in my 300WM and I have some Amax's but you need to sort them base to ogive..I sort them by weight also, but found they can shoot


Ray

 

[300 RUM]

Is there anyone who has done long range load testing at 100 yards have a target from 600yd & 1000yd to post side by side for comparison??

 

[Steve Blair]

Is there anyone who has done long range load testing at 100 yards have a target from 600yd & 1000yd to post side by side for comparison??

[br]
I recently shot my .284 Shehane for the first time in a year. I've been campaigning a .300 WSM during that period. Swapped the barrel to a proven one with ~975 rounds on it and for which I had 21 rounds left over from last year to zero. Shot the 21 rounds to get a good 100 yard zero. The load was developed at 100 yards and has previously done well in competition. The load previously averaged ~9-14 fps ES but was now around 21 fps ES. Not ideal but should be Ok for a Mid Range Regional that we were hosting. In the event, the load showed more vertical than I like and will need to be revisited before using it again. Targets from the 21 and my first record string are attached. The record target has 25 rounds on it, including 5 sighters. Score was 200-15X but shows some unwelcome vertical. Wind was mild, from the left.

 

[300 RUM]

Is there anyone who has done long range load testing at 100 yards have a target from 600yd & 1000yd to post side by side for comparison??

[br]
I recently shot my .284 Shehane for the first time in a year. I've been campaigning a .300 WSM during that period. Swapped the barrel to a proven one with ~975 rounds on it and for which I had 21 rounds left over from last year to zero. Shot the 21 rounds to get a good 100 yard zero. The load was developed at 100 yards and has previously done well in competition. The load previously averaged ~9-14 fps ES but was now around 21 fps ES. Not ideal but should be Ok for a Mid Range Regional that we were hosting. In the event, the load showed more vertical than I like and will need to be revisited before using it again. Targets from the 21 and my first record string are attached. The record target has 25 rounds on it, including 5 sighters. Score was 200-15X but shows some unwelcome vertical. Wind was mild, from the left.

Did you hit the 9's and walk it down? It looks like you really dont have much more then .4 - .5 MOA vertical unless the high shots came during the string and not from sighters.

 

[Steve Blair]

Yes, I forgot that I had set the zero 1 MOA high at 100 and came up full value. I had to come down just about 1 MOA. I shot the first day of the Regional with a fouled barrel from zeroing, so it shot to true POI from the first round.

 

[300 RUM]

Yes, I forgot that I had set the zero 1 MOA high at 100 and came up full value. I had to come down just about 1 MOA. I shot the first day of the Regional with a fouled barrel from zeroing, so it shot to true POI from the first round.

what is your 100 yard target shot with the same load or various loads if various which target represents your 600 yard target load

 

[Steve Blair]

All were shot with the same load, 57.0 grains H4831 SC and Berger 180 Hybrid. The sighting target was shot with year-old ammo and the Regional was shot with freshly reloaded ammo, brass on seventh firing. It was a little breezy at the range when I zeroed but I was surprised to see ES double from the last time the load was tested.