It is a special rifle
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Sorry for the hijack... did your rifle come with that stock or is it after market? I like it.
It is a special rifle
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The problem with shooting off the bipod or the handguard is also the variability of downward force you apply. Some shooters like to press (or pull) down the rifle against the bipod or a bench rest for more stability, others (like me) just rest it and use the supporting hand under the take forward bolt to support the gun. This may play a role why one person gets more of a POI than others. So, yes, if one shoots off the bipod and applies consistent force on the grip, one would get a minimal variation of POI. Ironically, shooting from a solid rest - and off the handguard area or the bipod - ends up being the worst situation being the most variable on where you place your supporting hand, if you use it, or the downward force due to body geometry.
A friend who's a Swiss designated marksman in his unit claims that the "sniper" rifles have additional support that mates the barrel more rigidly to the upper receiver. I can't verify what he means by it and whether the handguard is not somehow modified to reduce pressure on the barrel at the gas port end. Since my friend is issued a "sniper" version, I'll go with his explanation. By the way, he does not call his rifle the "sniper" version and he claims snipers in the Swiss army are issued bolt action rifles, maybe that will partially explain why the "sniper" version is an accurized designated marksman piece rather than a true sniper rifle.I took my Black Special out today and did some more testing. I fired prone off the bi-pod, then off the mag rest, then off the mag rest with the hand guard removed. With the guard removed firing from a mag support, the rifle gets amazing accuracy, but this is very impractical of course. Firing from the bi-pod gives you the feeling of most accuracy, but ironically it is the worst. Depending on how hard you "land" the rifle on the ground, and how hard you pull the rifle into your shoulder when firing, results in POI shift in my rifle of about 8 inches. My Black Special has lots of rounds through it, and the upper to lower fit is very loose, which also creates lots of accuracy issues. I tried folding a business card in between the upper and lower (to reduce slack), removed the hand guard, and fired off the mag. 5 shots went into a 1 inch group (which I think is great for this rifle), but POI is difficult to assertain because this is a very impractical way to fire a service rifle. I dont understand how they could offer a "sniper" version of this rifle.
POI shift is a fact of life with rifles in general.
This may be a bit of a news flash for you, but it even happens with barrels that are floated. Shocking I know....
The Swiss Army doesn't issue any specialiced sniper-version of the 550. And there is nothing done to the rifles of the designated marksman of the infantry platoon's either.
The only thing we use is an ancient but trustworthy Kern 4x24-scope.
Trust me, I've gone through their training.
probably bipod as he said that's how their regular infanteers train



























