It has some potential

S

stubblejumper

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This morning I shot my RPA/RKS/Robertson Composites rifle in 6.5x47 for the first time since purchasing it last fall. I started out cleaning after every shot for five shots, then after each five shot group for two groups, then I shot the remaining ten rounds. The first group was around 1/2" at 100 yards, and the following groups started to tighten as I kept shooting. The last group was the group below. Now I need to load some more loads, then try the gun at longer ranges, but it certainly looks as though the rifle has potential. But then again, rifles with the small McM stamped on the barrel usually do. I was also greatly impressed with the Zeiss Diavari 6-24x56 scope that I mounted on the rifle.

65x47group.jpg
 
Its hard not to like that cal. I shoot pretty much the same load as you. I turned the necks as a matter of routine and the groups improved. I also anneal after 4 firings. This is my rifle for precision matches and it holds its own easily out to 800 yards. I have a couple of dead playing cards from the 800 yard matches to prove it :)
 
Its hard not to like that cal. I shoot pretty much the same load as you.
Click to expand...

I picked the Lapua 123gr Scenar and H-4350, and R-15, as starting points. The brass is not neck turned, or prepared other than being run through a die, and having the neck chamfered. I started out with the bullets seated .010" off of the lands. Now it's a matter of shooting at longer distances, and fine tuning to see what the gun and load can really do.
 
Very nice group but where is the picture of the rifle? :p

Did Robertsons have the ensemble assembled or did they just do the stock? You can tell I don't know what RPA stands for.
 
I will get some pictures later.RPA is a manufacturer of actions, and the action, trigger, and bottom metal on my rifle are made by RPA. The barrel is by RKS, and the stock is a Robertson Composites Interceptor. Mick McPhee did all of the metalwork on the gun.
 
stubblejumper said:
I picked the Lapua 123gr Scenar and H-4350, and R-15, as starting points. The brass is not neck turned, or prepared other than being run through a die, and having the neck chamfered. I started out with the bullets seated .010" off of the lands. Now it's a matter of shooting at longer distances, and fine tuning to see what the gun and load can really do.
Click to expand...

I initially did not turn the necks, and the groups were for the most part good. I few guys posted problems with neck consistency with that brass so I decided to turn the necks. When I did I found that there was the odd piece that had a less consistent neck thickness, after turning they were all the same, and the groups did get better. This batch of brass is 2 years old now, so current brass may be more consistent now. I use 123gn Lapua, I tried 139 and even 142 (Sierra) but these were never very good so I went back to the 123's and have stayed with them for 2 years now.
 
Some 200 yard groups from this morning. The H-4350 loads ran between 3/4" and 1". but the R-15 loads did a bit better. While shooting the one group, the first three shots formed a group of less than .200", before reality set in, and the fourth shot opened up the group to just over 1/2". Naturally, now that the possibility of a sub .250" 200 yard group was gone, the fifth round went into the same hole as the first three shots. I am going to continue testing with R-15 at around 37.5 grains.

200yardgroups.jpg
 
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