OCW test help please!

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Went out this morning and did my first OCW test, with a gun with 20 rounds in it.

R700 accurate ordanace RC 1:10 twist. 300 wm

Load: 208 gr AMAX
H1000 primers
Fed GM 215 primers
15 thousands" off the lands

1= 74.5 gr
2=75 gr
3= 75.5
4= 76 gr
5= 76.5 gr
6= 77 gr

Round robin



Im thinking about loading at 75 gr and 76.8 gr and going to 300 yards and shoot some groups, what do you think?

5&6 first two shots were both touching each other and i either pulled it or the barrel got to hot, bummer.

Should I play with my seating depth, I really can get any closer to the lands because of my magazine.

 

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Also not very happy with these groups, its most likely me i haven't shot in a month and it is suppose to be a 106 degree day today, to say i was sweating in the back of my truck is an understatement.

If you see anything from my loading that could be off letme know, ie seating depth.

 

[HobbyShooter]

How far off the lands are you? I like 75.5 and would play with seating depth a bit on that load.

 

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15 thousands off the lands. It's a fully custom build by accurate ordance I would expect it to do better than 1/2 MOA on at least one of those loads.

I think I may try some bergers.

 

[HobbyShooter]

What about trying 178 grain AMAX? I was getting .3 moa or better with 168 grain SMKs, but have yet to find a combination with 175's that shoots as well.

 

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It's a 300 win mag so I don't really want to go that low I'm weight.

 

[HobbyShooter]

Lol. I can't read apparently. I'll shut up now.

 

[Pinecone]

75.5 looks best to me also.

 

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I loaded some 75.5 gr and am going to try bergers idea of 4 batches with deference a of .03" seating depth.

 

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So I went to the ranch and tested the seating depth method berger put out. He was right one load worked significantly better that the others. At .015" I shot a 1.6" group with a .44" vertical at 300 yards. All the others were around MOA. This load looks promising.

Going to adjust the seating depth more minutely to see if I can get the under 1".

 

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Now that we're on this note, what make shots push to the left? Weak left should or to strong right shoulder? With that vertical I was bummed it went over and inch. When I shoot and try to drive the recoil my rifle always tents to point 5" Hight and 2 feet left.