Adequate shots can be made at that range with barrels as short as 16", but the longer the barrel the higher the muzzle velocity and the better the performance at range. Generally speaking, a rifle designated as a "sniper" rifle won't have a barrel length less than 22" or longer than 26", though there are exceptions - I've seen long-range shooting rifles with barrels 30" or longer, but they are rare. There is no hard-and-fast rule about velocity and barrel length, but you can assume 25 fps per inch of barrel and not be far off.
The short answer is the same for any distance: "As long as you can comfortably carry and shoot."
A rifled slug can be fired from a smoothbore barrel with relative accuracy to about 100 yards. By relative accuracy, I mean that shots can be held in a 5 inch circle. That is about the size of the target zone on a deer. For a rifled barrel, rifled slugs should NOT be used, but sabot slugs can be.
Most .22 rifles are sighted at 25 yards. Some may be sighted for 50 yards, depends on your hunting. Try 25 yards, and hold higher for longer shots.
Well, yes and no. Support should go under the forearm, not the barrel. When a support is placed under the barrel, it MAY change the point of impact. The pressure of the forearm on the barrel may change, and the normal vibration of the barrel is changed. For a hunting grade .22 rifle used to 30 yards, you probbably would not see a difference. For a long range target rifle used at 500 yards, you WILL see a difference.
15 gallons = 0.07427 cubic yards (rounded)
The Dewar Match is for .22 prone match rifles and consists of 20 shots at 50 yards and 20 shots at 100 yards for a total possible score of 400. The modified Dewar Match substitutes 50 metres for 50 yards.
460 m, or 500 yards. However, the M25 version of the same rifle (sniper version) has a maximum EFFECTIVE range of 900 meters.
There is no one single best caliber, but to get an answer, you need to be a little more specific. Rifle or handgun? Define long distance. 50 yards? 100 yards? 1000 yards?
The sniper rifle dates back to the American Civil War when Confederate troops mounted scopes on rifles and could kill the enemy from distances of up to 800 yards. From World War I and beyond, what we know as the sniper rifle today became common.
Your shot shouldn't drop that much. Try controlling your breathing. Breathing in while taking your shot will push the barrel down and cause your aim to drop, breathing out will cause your barrel to rise and your shot to go high.
Mamimum range is about 900 yards. Maximum EFFECTIVE range is about 50 yards.
Well, first, you should ensure you can make it. You won't enlist into the Army or the Navy as a sniper - in the Army, you'd have to enlist as either an infantryman or Cavalry Scout, then request and be accepted for the Army's sniper course. IIRC, the only way to become a sniper in the Navy is by first becoming a SEAL. If you feel up to that challenge, by all means, go for it. I can't say with any certainty, but I believe you can enlist into the Marines for the Scout Sniper MOS. However, you still must pass the course before actually becoming a Scout Sniper. One thing you need to keep in mind is that there's a lot more to being a sniper than simply being a good shot. As for which one to choose, you need to decide what's best for you. -Bryce- Marine snipers are known for their best shot. Before you go in, you should know the basics on range cards, field sketches, moving silently in thick foilage, and other things. Knowing how to shoot a sniper (any BOLT-action rifle that can shoot past 250 yards, or a semi-auto rifle that could also shoot past 250 yards) rifle wouldn't hurt, either. Wish you the best of luck, and the choice is yours.
Yes. I have two and they are both very accurate with Remington rifled slugs. Set up a target at about 25 yards, fire one barrel and note where the slug hits. Then fire the second barrel, you should have two slugs impacting within a few inches of each other. Shoot at 50 and 100 yards and see what your accuracy is like. These shotguns were made for hunting, not for looking at. What you don't want to see is the right barrel shooting to the left and the left barrel shooting to the right, this is called crossing and it means you will have no accuracy past a couple of yards and you can't fix it without regulating the barrels.