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Posted: 9/19/2013 10:03:58 AM EDT
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I was playing with the new 545x39 model1sales upper on ddles vg-1 lower last night.....colt 3x scope and a barrel mounted valmet bipod (the newest, untested addition to the rifle)
I'm gonna find out how bad the bipod does for accuracy, if it just changes point of impact or if it just scatters and expands groupings with my next range visit....unless you guys say that's the most ridiculous looking thing posted in weeks.... 
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Why would the bi-pod change accuracy? Or POI? Unless it moved around on you it will make it more accurate, cross airs where you aim is where your going to hit reguardless Because its at the very end of the barrel and will be putting pressure there it'll have the opposite affect of say free floating the barrel. The weight is irrelevant since the by-pod is meant to support the rifle. |
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OP why not put the by-pod right in front of the gas block? I tried a scope on the carry handle many years ago but it never stayed put. because the barrel was turned to the correct diameter right behind the threads / muzzle brake to miraculously fit this valmet bi-pod without any additional work..... it is probably a 32nd to a 16th smaller than the rest of the barrel. bipod will not fit anywhere else except where it is now. |
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Quoted:
Because its at the very end of the barrel and will be putting pressure there it'll have the opposite affect of say free floating the barrel. The weight is irrelevant since the by-pod is meant to support the rifle. Quoted:
Quoted:
Why would the bi-pod change accuracy? Or POI? Unless it moved around on you it will make it more accurate, cross airs where you aim is where your going to hit reguardless Because its at the very end of the barrel and will be putting pressure there it'll have the opposite affect of say free floating the barrel. The weight is irrelevant since the by-pod is meant to support the rifle. Ah ok get it now. Never really heard of that, seems like it wouldn't have an affect unless the barrel were to get really hot from rapid fire or something |
| It may change your poi but I doubt it will hurt your accuracy much. Whats that, maybe an 8lb rifle. You will be supporting half of that. I've seen plenty of guys with pounds of crap on no free floated rails with non real damage to accuracy. I just don't see it being an issue supporting that small amount of weight. |
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It may change your poi but I doubt it will hurt your accuracy much. Whats that, maybe an 8lb rifle. You will be supporting half of that. I've seen plenty of guys with pounds of crap on no free floated rails with non real damage to accuracy. I just don't see it being an issue supporting that small amount of weight. I'm not trying to be a smart ass or anything but in your example shouldn't the free float rail take all the weight and pressure off of the barrel no mater how many flash light or whatever are on it? |
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One of the main causes of losing accuracy without free floating, aside from the pressure on the bbl itself, is the natural frequency of the vibrations become altered.
On that note, unless you're looking for MOA or sub-MOA accuracy, I wouldn't change it if you like it. |
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Quoted:
I'm not trying to be a smart ass or anything but in your example shouldn't the free float rail take all the weight and pressure off of the barrel no mater how many flash light or whatever are on it? Quoted:
Quoted:
It may change your poi but I doubt it will hurt your accuracy much. Whats that, maybe an 8lb rifle. You will be supporting half of that. I've seen plenty of guys with pounds of crap on no free floated rails with non real damage to accuracy. I just don't see it being an issue supporting that small amount of weight. I'm not trying to be a smart ass or anything but in your example shouldn't the free float rail take all the weight and pressure off of the barrel no mater how many flash light or whatever are on it? he said "no free float"... as in non-free float ... ? maybe? |
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One of the main causes of losing accuracy without free floating, aside from the pressure on the bbl itself, is the natural frequency of the vibrations become altered. On that note, unless you're looking for MOA or sub-MOA accuracy, I wouldn't change it if you like it. with the harmonics and vibrations in mind.... would a tight fit or loose fit be better? I'm thinking a tight fit would be more consistent...but am only hypothesizinginging. |
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he said "no free float"... as in non-free float ... ? maybe? Quoted:
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It may change your poi but I doubt it will hurt your accuracy much. Whats that, maybe an 8lb rifle. You will be supporting half of that. I've seen plenty of guys with pounds of crap on no free floated rails with non real damage to accuracy. I just don't see it being an issue supporting that small amount of weight. I'm not trying to be a smart ass or anything but in your example shouldn't the free float rail take all the weight and pressure off of the barrel no mater how many flash light or whatever are on it? he said "no free float"... as in non-free float ... ? maybe? Correct. I was typing too fast and missed an n. |
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Yes, it will change the POI. Yes, it will change the accuracy. Take a look at what a "tuner" does on precision rifles. Unless you are going to be shooting bench-rest with it, who really cares? After all, aren't they really for fun and SHTF? I agree here, and as far as POI change, it's not going to change it anymore when shooting off hand than a silencer would, and when it's supporting the rifle, I doubt there will be any POI change, look how many people use Bi-Pods/ Grip Pods off non floated rails or off m1913 railed gas blocks and you never hear any complaints.. I think your gtg, I still prefer my bi-pod mounted to a floated rail though, but yours has a unique/ cool factor to it. |
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People notice POI shifts when shooting with something as insignificant as a tight sling, altering grip, or bracing against a barrier. Resting the entire weight of the weapon on a bipod, at what is essentially the greatest distance from the fulcrum of the barrel, will certainly affect POI. Also, unless you are 100% consistent, slight changes in your own hold on the rifle will most likely change the amount of pressure on the barrel, and affect precision, too. People who hang all sorts of stuff off of non-floated handguards see shifts, too. However, this typically doesn't have as big of an effect on precision, as it is consistent.
Another thing to note is that, when using a standard front sight, it moves with the barrel. The front sight follows the muzzle, mitigating some of the movement. This is why I prefer not to mount my front sight to a floated rail. It stays stationary while the barrel moves. Using an optic mounted on the receiver is similar. Your reticule doesn't move with the muzzle, when it is being deflected by pressure on the barrel. However, as others have suggested, if you don't expect too much from it, you won't have an issue. If you do decide you want to shoot for accuracy, from varying distances, I would ditch the bipod immediately. |
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