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Joined: Sep 2010
Posts: 19,179
Campfire Ranger
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Campfire Ranger
Joined: Sep 2010
Posts: 19,179 |
[quote=MtnBoomer]Kiss, find pressure and rock on. +1, Been working for me for over 20 years now. Easy, easy, easy. xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx X 3. Kiss IF you can. Sometimes U can’t. Since the 80s for me. Jerry
jwall- *** 3100 guy***
A Flat Trajectory is Never a Handicap
Speed is Trajectory's Friend !!
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Joined: Oct 2016
Posts: 1,677
Campfire Regular
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Campfire Regular
Joined: Oct 2016
Posts: 1,677 |
[quote=MtnBoomer]Kiss, find pressure and rock on. +1, Been working for me for over 20 years now. Easy, easy, easy. xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx X 3. Kiss IF you can. Sometimes U can’t. Since the 80s for me. Jerry The 80s was almost 40 years ago not 20. Where does the time go? 🧐
Good bullets properly placed always work, but not everyone knows what good bullets are, or can reliably place them in the field
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Joined: Jan 2005
Posts: 4,907
Campfire Tracker
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Campfire Tracker
Joined: Jan 2005
Posts: 4,907 |
[quote=agazain]Begin with bullet weight and make in mind. Search data for likely powder. Test single cartridges for range of loads per powder -- check pressures. Load five or so of each weight group (powder charge) and shoot groups for accuracy. Vary OAL for powder charge(s) selected and see if any gain in accuracy. Chrony resulting loads to compare with published data results. I basically "luck into" good loads this way. Others do ladder tests and rocket science instead of my methods. I DO NOT push envelopes or go outside published data.[/quote) ^^^^^^^ THIS^^^^^ Except for the “pushing the envelope or exceeding published data” part!  memtb Tag
Ask for forgiveness......instead of permission
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Joined: Aug 2015
Posts: 13,232
Campfire Outfitter
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Campfire Outfitter
Joined: Aug 2015
Posts: 13,232 |
I agree with you Gtscotty; I have found OCW, in conjunction with a chrono, to be the easiest and quickest method for finding a good load. It can be shot at 100 yards and give readable data. To get good data with a true ladder test I would shoot at 300 yards or beyond. This target shows my results with 77gr, SMKs and H4895 powder at 100 yards. It was shot round-robin, so the groups were more equally affected by barrel warming. I shot at a pace of about one round per minute and took barrel cooling breaks after every 10 rounds. It's easy to see the movement of the groups to nodes at groups 4 and 9. You can see there is a velocity plateau between groups 3 - 5 with jumps of 30 fps on either side of those groups. Group 4 is my pick, and I will probably check that load with a few different primers and maybe backing off the bullet seating a bit to see if there is any more improvement to be had. OCW works! ![[Linked Image from i.postimg.cc]](https://i.postimg.cc/cLxwwwCm/RAR-77gr-SMK-H4895-7-3-20.jpg)
Last edited by NVhntr; 09/29/20.
Let's Go Brandon! FJB
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Joined: May 2003
Posts: 742
Campfire Regular
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Campfire Regular
Joined: May 2003
Posts: 742 |
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