Originally Posted by rufous
I got my rebarreled rifle back about 2 weeks ago. It is a sporter weight (9.5# with scope) 300 Win Mag with sporter stock for big game hunting on foot. It has a 26" stainless Lothar Walther barrel 1:10 twist. By the way that barrel is the easyist cleaning rifle I have ever had except for a couple 243 Winchesters that I shoot moly bullets out of. I am shooting uncoated bullets in the 300 Win Mag. The best load I have come up with so far is with the 220 Sierra Matchking at 2830 fps with 77 grains of H1000. I shot a 12 shot group at 400 yards that measured 5.2" (10 were in 2.75"). Then I tried that load prone with bipod and sling like I would be shooting at game in the field. I shot a 9 shot group of 7.4" at 500 yards with 6 of those in 3.4". I am wondering how to shoot better prone. I realize that a 9 shot group of 7.4" at 500 yards is mighty good and am quite pleased (I seriously doubt that I will ever shoot at game beyond 600 yards since I am on foot). However I would like to do better. The gun with this load is capable of apparently sub 0.7 MOA but my prone groups are twice that size. Any tips? Thanks, Rufous.
Preactice is the key.
First you have to figure out:
1) How to really get the most out of your bipod by bracing it against something like a log ro rock or digging the feet in slightly so you can really lean into it.
2) Learn to use what's available as a rear bag. Rock, carried tactical rear bag etc.
3) Breathing/heart rate-See the thread we did here on trigger, timing, practice.
Trigger timing, training, practice
4) Consistency in mounting. Much moreso prone than on the bench you really have to practice at getting the same mount and cheek weld every time when prone and sometimes it's flat not easy. Also make damned sure you have a solid weld from the butt stock to your shoulder, and in the same place every time. If you don't it's going to beat you up.
Now one technique I use to increase stability is to set my left elbow inside the loop of my sling and hand under the stock or at an angle. I then slide my elbow out to tension the sling which creates a downward force on the rifle to help in loading up the bipod and the rear bag at the same time. You can also use this same method and curl your left arm up under the rifle to use your fist as a field expedient rear bag.
More than anything practice and work hard on finding the technique that works best for you consistently.