Jon Bischof
Well-Known Member
bstomper, Does your Model 70 have the factory stock or another stock? I assume you have checked it after warmed up to see if the barrel is still floating?
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Cold bore accuracy
- Thread starter bstomper
- Start date
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Mikecr
Well-Known Member
There are 2 things I do for cold bore accuracy:
1. Clean the bore to white metal clean after every use, followed by dry pre-fouling with a burnishing of tungsten(WS2), before putting the gun away.
2. Cold bore accuracy development, which takes considerable discipline & time.
Precision, and the hot bore accuracy provided there, can be completely different than cold bore accuracy.
They can be different potentials all together.
For example, I load developed for competitive level precision with a Tubb T2000(tube gun) at 600yds. And the gun performed per it's intended design there. Very good shooter. But I actually bought the gun for varmint hunting, so then I rolled over to cold bore testing.
With a beginning test, I found right off that the gun had zero hunting potential for me. Also, that it would not be worth greater investments to that point.
Basically, I fired 2 shots quick from a cold bore at 200yds, then every 10 minutes fired 2 more. 10 minutes was chosen because every barrel I've ever tested hates a 10min shot rate, and I wanted to see the worst from this gun (how much work was in front of me). It was new brass as well, but that's ok, I can still see what I need to here.
I expected to see was some elongation in a 10sht group. What I got was a walking spread from each 1st shot, with 2nd shots falling into an ugly group, but at least a group.
This gun worked fine for hot bore group shooting(competitive format), but if you see anything like this from a well built hunting gun, don't waste your time with it in the field.. Get another barrel, cut rifled, and start over.
1. Clean the bore to white metal clean after every use, followed by dry pre-fouling with a burnishing of tungsten(WS2), before putting the gun away.
2. Cold bore accuracy development, which takes considerable discipline & time.
Precision, and the hot bore accuracy provided there, can be completely different than cold bore accuracy.
They can be different potentials all together.
For example, I load developed for competitive level precision with a Tubb T2000(tube gun) at 600yds. And the gun performed per it's intended design there. Very good shooter. But I actually bought the gun for varmint hunting, so then I rolled over to cold bore testing.
With a beginning test, I found right off that the gun had zero hunting potential for me. Also, that it would not be worth greater investments to that point.
Basically, I fired 2 shots quick from a cold bore at 200yds, then every 10 minutes fired 2 more. 10 minutes was chosen because every barrel I've ever tested hates a 10min shot rate, and I wanted to see the worst from this gun (how much work was in front of me). It was new brass as well, but that's ok, I can still see what I need to here.
I expected to see was some elongation in a 10sht group. What I got was a walking spread from each 1st shot, with 2nd shots falling into an ugly group, but at least a group.
This gun worked fine for hot bore group shooting(competitive format), but if you see anything like this from a well built hunting gun, don't waste your time with it in the field.. Get another barrel, cut rifled, and start over.
