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Good load gone bad?? Or at least i think so.

 
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  #1  
Old 09-03-2013, 11:37 PM
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Posts: 35
Good load gone bad?? Or at least i think so.

Have any of you ever have a good shooting load out of a rifle go bad?I have a fairly new custom barrel remington model 700 chambered in 300 Win, that shot the following load well under 1/2 moa. Now all of a sudden it wont group under 1" at 100 yards. The barrel doesnt have but 600 rounds down it. I clean the barrel every 50 rounds. Any ideas are greatly appreciated! Have any of you guys experienced this?
My load is as follows:
Rem Brass
Fed 215 Primer
68 Gr H-4350
185 Berger Hunting VLD
Velocity-3095
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  #2  
Old 09-04-2013, 02:17 AM
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Posts: 405
Re: Good load gone bad?? Or at least i think so.

Unfortunately it happens.
I've been in the same situation as you with ADI/Hodgdon powder, it may be temp stable but humidity is another story I found. H1000 was the worst for playing up from one shoot to the next. I no longer use it at all, I switched to either RE22 or RE25, haven't had a problem since.

Cheers
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  #3  
Old 09-04-2013, 04:58 AM
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Location: SOCIALIST CONTROLLED TERRITORY OF NEW YORK
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Re: Good load gone bad?? Or at least i think so.

Quote:
Originally Posted by Iden View Post
Have any of you ever have a good shooting load out of a rifle go bad?I have a fairly new custom barrel remington model 700 chambered in 300 Win, that shot the following load well under 1/2 moa. Now all of a sudden it wont group under 1" at 100 yards. The barrel doesnt have but 600 rounds down it. I clean the barrel every 50 rounds. Any ideas are greatly appreciated! Have any of you guys experienced this?
My load is as follows:
Rem Brass
Fed 215 Primer
68 Gr H-4350
185 Berger Hunting VLD
Velocity-3095
Why are you cleaning every 50 rounds?
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Old 09-04-2013, 05:58 AM
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Re: Good load gone bad?? Or at least i think so.

Were there any changes in the lot#'s of any of your load components? If not, I would confirm that it is actually the load that is the problem. When I have had this happen it has almost always been the the rifle. Typical causes have been loosened scope mount components, loosened bedding screws, scope problem, bipod, or barrel wear. If you had checked your bullet seating depth to the lands, I would recheck it to make sure it is the same. When my groups opened up on my 270WSM it had increased a little less that an eigth of an inch from throat erosion. This occurred at 700 rounds fired and caused my groups to open about the same degree as yours. I recently went through a situation with my 300WM that would shoot .25-.5MOA very consistently. I had been shooting with a Harris Bipod and switched to an Atlas. When I first set it up using a Triad Tactical pic rail it shot the same as the Harris. I switched the pic rail to a Seekins mount that had an itegrated sling mount and was a a much sleeker design. The only problem was that the fit between pic rail and the mounting system was a loose fit causing a small amount of wobble. This was enough to open my groups up to +1MOA. When I switched hack to the original Triad rail which had a solid fit, my groups returned. Sorry for the ramble but I had experienced this quite a few times over the years.
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Old 09-04-2013, 07:04 AM
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Location: Cheyenne, Wy
Posts: 38
Re: Good load gone bad?? Or at least i think so.

Ive heard that different lots of powder can cause this issue, even if its the same powder you have been using, a very small subtle change could have been made while making the powder which could create a different burn rate, pressure etc....I would maybe consider loading 67.8, 67.9, 68, 68.1, 68.2 of your H-4350 and see if you adjusting to it makes a difference and tightens your group back up.
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Old 09-04-2013, 07:23 AM
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Re: Good load gone bad?? Or at least i think so.

Likely your load wasn't that good to start with. I've seen rifles toss three or four good groups (often sub 1/4 moa) with a load and often more before the load proves itself to be crap. A good chance your barrel is marginally tolerating the bullet.
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  #7  
Old 09-04-2013, 08:25 AM
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Join Date: Oct 2011
Posts: 35
Re: Good load gone bad?? Or at least i think so.

Thanks to all for the helpful advice! As far as the reloading components go I am still on the same lot number of my powder and bullets! I was wondering if my throat could be starting to slightly erode, ( corret me if im wrong)but I thought It would take more rounds to start that?

ICANHITHIMMAN
I have just had the idea of not letting the gun get too dirty. Am I cleaning the gun too much? How often do you all clean ur gun?

Thanks again
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