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20 Practical load work
Finally got to the range today for some initial load work on my 20 Practical. These were all virgin cases. I elected to do the cases a bit differently than most for the initial fire forming. I faced off a shell holder .005 to push the shoulder back, ran new Lapua cases through a .223 neck die, then through a Redding 223 f.l. bushing die with the .230 bushing spaced up just enough to form a false shoulder. I also used a Redding carbide floating .20 cal. ball expander to make the neck i.d. as round as possible. The bolt closed with just a slight bit of resistance and the cases f-formed beautifully with a sharp neck/shoulder junction.
With this setup, I don't have the neck tension I'd like for tuning but all in all, it went pretty well. Now I have a good number of fired cases so I can dispense with the floating carbide neck expander and move on to working with some different bushing sizes for increased neck tension. My suspicion is than some more neck tension will likely take at least half a bullet of vertical out of the groups. The winds were l-r today. On the left two groups with the N133, I elected to shoot through the velocity changes to see how flat the groups were. As expected, I got a nice little 'weather report' group with minimal vertical, confirming that increasing power would calm the vertical down. N133 shines. H4198 is decent but comes up on pressure really quick with these 40's. Again, no surprises. The Kreiger barrel broke in quickly, as have all my barrels that I've 'burnished' prior to firing. Basically, after 3-4 rounds the fouling was gone and it was on to load work, cleaning only when changing powers. A few of the groups from today and a range pic: Last edited by Al Nyhus; 08-10-2018 at 06:03 PM. |
#2
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Nice shooting and a nice setup. What twist is your barrel?
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Shoot First... Ask questions later... On Saubier.com __________________ NRA Lifetime Endowment Member |
#3
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Good shooting! On my three .20Ps nothing has done better than N133. I'm at 23.9 and BR4s with the BIBs for best accuracy, Muller 11 twist.
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Good shooting Al...
It’s nice to see you back at it,your attention to detail and loading expertise show up in your groups.I am glad to see your posts again,I am excited to shoot the BIBs that you sold me in my heavy Nesika J 20BR.Thanks for inspiring my to get of my butt and get out and shoot.I am sure countless others will appreciate what you bring to the table.
Matt
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NRA Benefactor Member VHA Life Member IBS Member |
#5
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Did you have chrony numbers?
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#6
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More range work today yielded results. As suspected, it wanted more neck tension to clean up the vertical. This was the best 5 shot group...nothing went over the mid .2's even in some twitchy winds. -Al
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#7
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Nice shooting Al!
Varmint beware!
Nice looking rig,may be too heavy to bring into the field for fox or coyotes,but pd’s and crows may have some trouble Matt
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NRA Benefactor Member VHA Life Member IBS Member |
#8
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Quote:
https://swfa.com/swfa-ss-2-5-10x32-u...fle-scope.html Be well. -Al |
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Quick work with a wonderful barrel.
'Course, everything else must be spot-on as well. Daryl
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Daryl |
#10
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Sounds like a good plan to me Al...
Those varmints will really be in trouble then Al.Just looked at the FieldCraft,nice looking rig.
Matt
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NRA Benefactor Member VHA Life Member IBS Member Last edited by 17VLD; 10-26-2018 at 11:23 AM. |
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