Light barrel/light bullets???

pyscodog

Active member
Do pencil barrels tend to shoot light bullets and lighter loads better than a heavy bullet and a hot load or even a light bullet with a hot load??? Its probably a dumb question but my Rem Mountain rifle/260 shot a 120 grain bullet with a light load of H4350 really well. The more powder, the bigger the groups got. If it will shoot groups like the light load shot consistently, I can live with that.
 
No bullet weight does not come into play. You just encountered loads that acted differently. Some barrels like it hot, some not. Fat or skinny they are different in their preferences. Some skinnys need to be shot slower thanks to walking of the hot tube.

Greg
 
Bullet weight, powder charge, and barrel twist rate need to be matched for accuracy..Barrel contour will have little to do with it unless you are shooting fairly rapidly for a sustained time period..

Slow twist barrels (1/12 or 1/14) work better with the lighter weight bullets, heavier weight bullets work better with the faster twist barrels (1/9 to 1/7)...
 
Didn't really figured it mattered. It is just the 120's at a lower charge shot really good and the hot loads opened up. Way up compared to the lighter charge. I guess this is what makes it fun and drives you nuts at the same time. LOL I have always said rifles are like women. Ya just never know!
 
Just curious if you reached max pressure for your rifle or not? Maybe there's another node higher up that you didn't make it to ? Just a thought.
 
Originally Posted By: SetTriggerJust curious if you reached max pressure for your rifle or not? Maybe there's another node higher up that you didn't make it to ? Just a thought.

I was at book max but was wondering about bumping it up a little more. At book max, I saw no indication of pressure, groups just got quite a bit bigger.
 
Idk pyscodog..... work is a factor of force times distance. There's more work performed to stabilize a heavier bullet, so it makes sense on paper.

I'm not saying they won't shoot well. I'm just saying the strings might need to be longer in order for the barrel to return back closer to cold bore settings.

Truthfully, I wouldn't worry about it. I'd just load what shoots and go on about your life.
 
When dealing with an ultra light barrel that is whippy and drives me crazy on grouping, I found a solution that is very effective in solving this issue, SOME of the time.

I will assume that you have already bedded your rifle and your barrel is freefloated.

Next, I will bed 2" of the barrel at the tip of the forearm, but I will not tighten the screw all the way down, about one full turn off. Then when the bedding material sets up, then tighten the screw all the way down. You now have a pressure point on the end of the stock.

If you want to remove the pressure point later on, then place two thick pieces of 3M packaging tape in the barrel channel prior to putting in the bedding compound. The pressure point can easily be removed if you find that the results were undesirable.

This method has helped a few guns.

Often I have wondered if the barrel was not stress relieved after turning the barrel down, which would make the barrel walk around.
 


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