I am working up a load for my 300Wby using the Hornady 212 ELDX. Each group I fire has a flyer in it usually high left about an inch or so out. The other 2 shots are touching or almost touching. The powder I am using is Retumbo and is giving good velocity out of my 24 inch barrel. I think the primers in these loads are Remington's but I prefer Federal 215's. The one prblem that comes to my mind is seating depth as my Hornady die varied about .oo2 on the depth of seating. Could it be another issue I am missing like neck tension or some thing.
What is causing my flyer.
- Thread starter WildBillG
- Start date
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bob4
Well-Known Member
How high left? And what yardage? I agree on Fed primers too. If there is no vertical issues or they are minimal. I usually look to seating depth. Bigger vertical issues I look at charge weight. Then all reloading steps are checked for accuracy/consistency. Cleaning the rifle each time? I don't. Mine likes it dirty.
bob4
Well-Known Member
I also should have asked how you've worked the load up to get where you are. Seating depth then charge weight? Visa versa works just as well. I never change more than 1 thing at a time.
Is the flyer always the 3rd shot?
25WSM
Well-Known Member
Waiting for more info. But I like the seating depth answer do far. Seating depth sort of changes group shapes more.
Shep
Shep
The flyer is is more left than high. My seating depth was just magazine length as I cannot seat bullets far enough out to reach the rifling. As for the shot 2 were 3rd shot one was the second shot. The one that was the second shot I wanted to blame my self but next load had the flier the same way. I am using my brake so recoil is not the issue. The brake I have makes shooting this rifle a real joy. It is just so baffling as I said 2 shots touching and that flier an inch to inch and a half away.
25WSM
Well-Known Member
Just because you are at mag length doesn't mean you can't tune your seating depth. Bring it in shorter if that's the only direction left. Not tuning your seating is leaving way too much on the table.
Shep
Shep
Just did a COL measurement on my gun and I can seat to 3.648 with these 212's. The length of my mag is 3.640 so I have room to seat out further than I thought. My test loads were at 3.620. Should I go farther out or seat deeper.
cohunt
Well-Known Member
You have a chronograph? Are you shooting level each time? Any wind? Mirage? How long between shots.
All info that may or may not be of help
All info that may or may not be of help
59FLH
Well-Known Member
"about an inch or so out. The other 2 shots are touching or almost touching."
Cheek weld
Cheek weld
Kmccord
Well-Known Member
I would look at barrel temp, not sure how fast you are shooting, if it is the last shot out of a string of three, may want to try and lengthen the time between shots. I would also try a five shot group and see if the amount of flyer's increase.
25WSM
Well-Known Member
For your initial seating depth go as long as you can fit. If it's a hunting rifle I would stay . 010 off jam or longest. For a target rifle I do the same but when I reach . 025 off I will see if any of the jam lengths will work. I hear the Berger seating method has worked for some guys but I normally find a good jam in the less than . 025 off range. Once you find that jam length go back and do a group above and below with powder charge change. Follow the direction that gets better. Mark the piece of brass that throws the flier. It could be off in volume enough to change impact point.
Shep
Shep
Canhunter35
Well-Known Member
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Is this a sako av in 300wby?
I could be the barrel heating up and changing the harmonics. I found with my 257 if I would shoot cold bore like 15min between shots it performed really well.
I've had issues with my 300wby, it's a sako av doing that exact thing with the 212eldx. For awhile I wondered if it was the barrel heated up, the 212s being inconsistent. I made loads with h1000, and imr7977 and finally used imr7828 and it doesn't do that with the 7828.
When I was shooting the h1000 loads out past 600 I began notice vertical spread on fliers. Which I think is the cause of your flier at a 100.
Try 7828, it's not temp insensitive but I get the best accuracy with it
I could be the barrel heating up and changing the harmonics. I found with my 257 if I would shoot cold bore like 15min between shots it performed really well.
I've had issues with my 300wby, it's a sako av doing that exact thing with the 212eldx. For awhile I wondered if it was the barrel heated up, the 212s being inconsistent. I made loads with h1000, and imr7977 and finally used imr7828 and it doesn't do that with the 7828.
When I was shooting the h1000 loads out past 600 I began notice vertical spread on fliers. Which I think is the cause of your flier at a 100.
Try 7828, it's not temp insensitive but I get the best accuracy with it
What is the SD and ES?
