What sort of ES/SD is good enough for 600yd BR

[1KBR]

I have a new 284 which is shooting great groups at 300yds testing at my local range which is as far as I can get out to at the moment. Problem is ES is up to 25 fps with its most accurate 300yd load. I like to get down to 15fps max for my 1000yd rig, but was wondering what ES/SD you find acceptable for 600yds.

 

[watercam]

I always aim for single digit SDs regardless of range. For High Power or F-Class shooters the X-ring is the same relative size out to 800 yds. and then reduces out to 1K (as I am sure you are very aware).

 

[1KBR]

I always aim for single digit SDs regardless of range. For High Power or F-Class shooters the X-ring is the same relative size out to 800 yds. and then reduces out to 1K (as I am sure you are very aware).

Yes the F class X ring might be similar size but in long ranges I realise that ES/SD becomes more important while at short ranges ES/SD is not so important. Check out point blank BR, they don't care much about weighing charges and ES/SD while at 1KBR we fantasize about weighing everything and getting ES/SD down as low as possible. Where does 600yd BR stand?

 

[Jason Boersma]

600yd bench rest is just like 1000 you want your Es to be as low as possible, always try to get it below 10fps, if you can't you might have to shoot it in a match and find out if it shoots to your liking.

 

[Dgd6mm]

I have a question, what type of scale are you weighting your charges on? My buddy had one of his beam scales tuned by Scott Parker. He loads for his .284 and thru my magnetospeed it is in the single digit es. I do know that the 120 whatever it is, is the cat's meow for electronic. It may be the scale you are using, just a thought.

 

[BenPerfected]

Besides the powder charge, annealing and bullet lube, are there other reloading process that impact SD/ES? Assuming the powder charge is spot on, the neck/bullet is lubed, what the max spread in PSI in neck tension you sort that to get a consistent low SD? It seems to me that I might still be missing something....like ignition?
Ben

 

[Jay Christopherson]

Besides the powder charge, annealing and bullet lube, are there other reloading process that impact SD/ES? Assuming the powder charge is spot on, the neck/bullet is lubed, what the max spread in PSI in neck tension you sort that to get a consistent low SD? It seems to me that I might still be missing something....like ignition?
Ben

Primer choice can be fairly significant - I keep three different brands on hand. If all else is accounted for and I'm not seeing the numbers I want, I'll try different primers. I've seen my numbers drop pretty significantly, just by using a different primer. Some guys even incorporate primer testing as a default part of their initial load workup process.

 

[ShootDots]

Besides the powder charge, annealing and bullet lube, are there other reloading process that impact SD/ES? Assuming the powder charge is spot on, the neck/bullet is lubed, what the max spread in PSI in neck tension you sort that to get a consistent low SD? It seems to me that I might still be missing something....like ignition?
Ben

Primer choice can be fairly significant - I keep three different brands on hand. If all else is accounted for and I'm not seeing the numbers I want, I'll try different primers. I've seen my numbers drop pretty significantly, just by using a different primer. Some guys even incorporate primer testing as a default part of their initial load workup process.

I am one that DOES incorporate primers into the load develop regimen... It is the last step to squeeze all I can get out of a load. I have 4 different primers both in L/R and S/R..

 

[savagedasher]

I see a big difference in primers. I haven't seen neck tension make much change using the Hybrids. VLD is another story. I jump my Hybrids .020 plus. The VLD I had to jam so neck tension was a must. I never have used lube. I think the reason for using lube is because the way the cases are cleaned. I tried case that was cleaned with sonic and stainless media .With both those method my ES went south. Larry

 

[BenPerfected]

I have been shooting Varget with the CCI 450's in my 6 Dasher. I also have a few boxes of the Federal 205M, but have not shot them. Are there any other primers you have had success with?
Ben

 

[savagedasher]

Best primers with my load is Wolf mag. 205m second I just got 20,000 Tula . Testing them Wednesday.
ES is under 5 with Wolf 7 to 9 with 205m. 450 I always had 3 or 4 out of 100 be way off. I use them now just for fire forming. Larry

 

[Alex Wheeler]

All that matters is whats on the target. Better ES may not make your groups better. My advise is to loose the chrony and shoot at 600 and 1000. If you cant shoot that distance, then make your best guess, it may or may not hold up at 1k.

 

[BenPerfected]

Here is my plan. Shoot my current 6 Dasher load with 32.2 gn Varget, .020 jump, and just vary the primers. 20 shots with the CCI 450, CCI BR4, Wolf Magnum and the Federal 205m.
I this point, I am more interested in SD & ES than accuracy at the target.
Ben

 

[savagedasher]

Here is my plan. Shoot my current 6 Dasher load with 32.2 gn Varget, .020 jump, and just vary the primers. 20 shots with the CCI 450, CCI BR4, Wolf Magnum and the Federal 205m.
I this point, I am more interested in SD & ES than accuracy at the target.
Ben

Ben it sounds like a lot of rounds . Different amount of powder drop can take different primer seating depth is the same.
If I was doing the test I would do 4 different powder drops and the same amount of seating depth changes. When I found one that shot good with low ES I would go back and verify. Larry

 

[BenPerfected]

Here is my plan. Shoot my current 6 Dasher load with 32.2 gn Varget, .020 jump, and just vary the primers. 20 shots with the CCI 450, CCI BR4, Wolf Magnum and the Federal 205m.
I this point, I am more interested in SD & ES than accuracy at the target.
Ben

Ben it sounds like a lot of rounds . Different amount of powder drop can take different primer seating depth is the same.
If I was doing the test I would do 4 different powder drops and the same amount of seating depth changes. When I found one that shot good with low ES I would go back and verify. Larry

Larry,
Today, my load and tune are good so I'm just looking to see if just a primer change might make a statistically accurate difference. If it does, I could then go back and work on adjusting the powder charge and tuner setting if necessary.
Ben

 

[savagedasher]

Here is my plan. Shoot my current 6 Dasher load with 32.2 gn Varget, .020 jump, and just vary the primers. 20 shots with the CCI 450, CCI BR4, Wolf Magnum and the Federal 205m.
I this point, I am more interested in SD & ES than accuracy at the target.
Ben

Ben it sounds like a lot of rounds . Different amount of powder drop can take different primer seating depth is the same.
If I was doing the test I would do 4 different powder drops and the same amount of seating depth changes. When I found one that shot good with low ES I would go back and verify. Larry

Larry,
Today, my load and tune are good so I'm just looking to see if just a primer change might make a statistically accurate difference. If it does, I could then go back and work on adjusting the powder charge and tuner setting if necessary.
Ben

Ben 32.2 gr in my gun is a very mild load. 56000 Psi When I tested down that low my ES wasn't very good. and the powder was very dirty.
When I went to 32.8 and higher my ES flatten out and was lower. Low pressure some time the burn rate doesn't have low ES. Larry

 

[maxpower]

Besides the powder charge, annealing and bullet lube, are there other reloading process that impact SD/ES? Assuming the powder charge is spot on, the neck/bullet is lubed, what the max spread in PSI in neck tension you sort that to get a consistent low SD? It seems to me that I might still be missing something....like ignition?
Ben

I don't think it is my reloading equipment as I have had many other barrels which have very low ES/SD. Most of those barrels could not shoot as tight at 300yds as this barrel which is why I think it may have potential out to 600yds IF the ES/SD is not too bad.
I am loading this barrel pretty much the same way I have loaded my previous 2 barrels with same reamer and components, but just cant get ES/SD as low.