I have a buddy who has an interesting quandry with his duty rifle and I am trying to help him figure out the problem. ETA: This is his assigned rifle for the Tac Team where he serves as one of two snipers.
Rifle is a stock 700P .308
Unknown round count, he is the 3rd officer it has been issued to. The previous 2 did not keep log books or round counts. He estimated that round count was likely to be in the 3K range.
He has had the rifle for 2+ years and shoots it every month. Consistent sub MOA accuracy for 5 shot groups.
CBS has always been 3/4" high at 100yds.
He is meticolous about cleaning the rifle after every shooting session, whether it is 5 rounds or 50 rounds. He is VERY anal about this.
He shoot yesterday and today and had very odd outcomes.
Each cycle would start with CBS which was 1" left and 5" high or low. Over the course of 3-4 rounds it would tighten up and would shoot into a group approximately 1"
He repeated this several times and there was no rhyme or reason as to whether it would start high or start low.
All screws are torqued correctly, scope tracks correctly.
Only variable is that the temperature is about 15F
So.....
First I told him thatthe barrel probably is getting towards the end of its life at 3K rounds (est) considering it is a factory barrel.
Is it possible, that with a stock remmy barrel and a worn throat, the cold can constrict the metal enough to cause funky effects and as the barrel and throat warm from fired rounds the gun settles down?
Rifle is a stock 700P .308
Unknown round count, he is the 3rd officer it has been issued to. The previous 2 did not keep log books or round counts. He estimated that round count was likely to be in the 3K range.
He has had the rifle for 2+ years and shoots it every month. Consistent sub MOA accuracy for 5 shot groups.
CBS has always been 3/4" high at 100yds.
He is meticolous about cleaning the rifle after every shooting session, whether it is 5 rounds or 50 rounds. He is VERY anal about this.
He shoot yesterday and today and had very odd outcomes.
Each cycle would start with CBS which was 1" left and 5" high or low. Over the course of 3-4 rounds it would tighten up and would shoot into a group approximately 1"
He repeated this several times and there was no rhyme or reason as to whether it would start high or start low.
All screws are torqued correctly, scope tracks correctly.
Only variable is that the temperature is about 15F
So.....
First I told him thatthe barrel probably is getting towards the end of its life at 3K rounds (est) considering it is a factory barrel.
Is it possible, that with a stock remmy barrel and a worn throat, the cold can constrict the metal enough to cause funky effects and as the barrel and throat warm from fired rounds the gun settles down?
