Went to the range on Friday afternoon to test the 81.5, 81.7 & 82.0 loads...
60 degree day, 2-3 mph crossing winds. Great night for shooting.
Burned 3 shots and then did the same process as before with the OCW process (81.5 at target 1, 81.7 at target 2 and 82.0 at target 3. Shot 4 rounds of this. Looking back, I noticed that round 3 were all off. I was starting to rush the shots and the barrel was starting to warm up at that point. I still allowed for 5-8 minutes between shots to keep the barrel somewhat cool.
The results were very strange to me...the cord for my camera is at work so I will have to post pictures later if you guys would like to take a look at the targets. Let me know if there is any interest.
81.5 shot a .8" group (first two shots were in the exact same hole, couldnt even tell that two shots went through the same hole by the burn marks on the paper!) Good group but what I found strange was that it hitting 2" lower than the other day. The gund was cleaned before starting but nothing else was changed, except for wind. Can wind cause differences in vertical grouping?
81.7 was all over the place which I found strange given the great groups that 81.5 and 82.0 displayed previously. I was certain that 81.7 was going to be the load...it wasnt.
82.0 shot 5 shots in a .6" group!! (I believe that this is the optimal charge for this rifle) This group was right on top of the 82.0 group from the other day. The centers of each group were about .5" off. I wonder why the 81.5 gr group's POI was so different and the 82.0 groups were very similar??
I believe I am going to stick with 82.0 grains as this has constently grouped well with these two days. I think I will do some further testing this winter with 81.5 again as this put 2 shots in the same hole on two different occurences... I think some more test groups would be a good tell along with the 82.0. It is getting very close to the season and I need to load up 82.0 and get those sighted in and figure out POI at further distances.
Now, a lot of you recommended bedding and taking the pressure point out. I have a few questions that hopefully some of you can help me with.
1. If I sand out the pressure point, will 82.0 still be the best group or will that throw everything off again due to barrel harmonics and I will need to do all of this over again...?
2. How do I go about glass bedding this stock. I am certain it is a Bell & Carlson with a aluminum bedding block. Do I need to pillar bed this as well? I have done some researching on glass bedding and most say it can only help accuracy so I figure why not try it. Any advice for glass/pillar bedding this stock and weatherby mk v action? Here is a picture of the stock inlet.
3. If I take the pressure point out and float the barrel, should I then be able to shoot with my harris bipods?
Thanks for all of your help and suggestions!