Hornady#546361 K31 dies
- Thread starter mbogo3
- Start date
Cocked&Locked
CGN Ultra frequent flyer
- Location
- S. Ontario
Hornady's engineering department replied to me. The K31 series dies size the base of the case as well as the neck somewhat smaller. The primary use is for STG 57 shooters, rather then K31. Course since i can't have a STG 57 in canada, i'll keep using my 7.5 swiss dies.
May take some tweaking but so far my 35 Hex 91/30 outshoots my new K31.Expected better than 2" at 100 yards. How snug should the K31 stock screws be ? Don't have a tool to measure anyways.Groups seemed to be 4" low at 100 yards..May need a shorter front sight?Don't wish to slide and leave the rear sight at 200+. Set at 200 it was still low.I will try and get a few rounds of GP11 to see if it regulated then try to duplicate that.Harold
Follow the pre-sight in instructions, especially for barrel bands.
GP11 as a control is a must when first working up your loads.
Don't be afraid to try a rather large gap off the lands, all the way to touching the lands.
http://theswissriflesdotcommessageboard.yuku.com/topic/9083/How-to-Sight-In-A-Diopter
From Berger Bullets:
"For years we have relayed that it is best to jam the VLD into the lands for best performance. This works for many rifles however there are many rifles that do not shoot the VLD well when the bullet is jammed. We have learned that the VLD can shoot best as much as .150 jump off the rifling. VLD bullets can be sensitive to seating depth and it has been found that these bullets shoot best in a COAL “sweet spot”. This sweet spot is a COAL range that is usually .030 to .040 wide.
The quickest way to find this sweet spot is to load ammo at four different COAL. Start with a COAL that allows the bullet to touch the rifling. The next COAL needs to be .040 off the lands. The third COAL needs to be .080 off the lands. The last COAL needs to be .120 off the lands. One of these COAL will outperform the other three by a considerable margin. It has been reported that the VLD bullets don’t group as well at 100 yards but get better as the bullet “goes to sleep” at further ranges. We have learned that by doing the four COAL test you will find a COAL where the VLD bullets will group well at 100 yards. Once the COAL that shoots best is established you can tweak +/- .005 or .010 to increase precision or you can adjust powder charges and other load variables. Frankly, those who do the four COAL test usually are happy with the results they get from this test alone."
GP11 as a control is a must when first working up your loads.
Don't be afraid to try a rather large gap off the lands, all the way to touching the lands.
http://theswissriflesdotcommessageboard.yuku.com/topic/9083/How-to-Sight-In-A-Diopter
From Berger Bullets:
"For years we have relayed that it is best to jam the VLD into the lands for best performance. This works for many rifles however there are many rifles that do not shoot the VLD well when the bullet is jammed. We have learned that the VLD can shoot best as much as .150 jump off the rifling. VLD bullets can be sensitive to seating depth and it has been found that these bullets shoot best in a COAL “sweet spot”. This sweet spot is a COAL range that is usually .030 to .040 wide.
The quickest way to find this sweet spot is to load ammo at four different COAL. Start with a COAL that allows the bullet to touch the rifling. The next COAL needs to be .040 off the lands. The third COAL needs to be .080 off the lands. The last COAL needs to be .120 off the lands. One of these COAL will outperform the other three by a considerable margin. It has been reported that the VLD bullets don’t group as well at 100 yards but get better as the bullet “goes to sleep” at further ranges. We have learned that by doing the four COAL test you will find a COAL where the VLD bullets will group well at 100 yards. Once the COAL that shoots best is established you can tweak +/- .005 or .010 to increase precision or you can adjust powder charges and other load variables. Frankly, those who do the four COAL test usually are happy with the results they get from this test alone."
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Got 2.918" with a 165 Cor Lokt touching the rifling,2.878" off .040,2.838" off .080 + 2.798 "off .120 Will try another series of test groups. Will try a proven "Pierre" load of 47gr/IMR 4831 and see what happens.After that if successful I can play with the RE#15 + Varget once the best OAL is determined Harold
