Question: An anvil firing and explosive fireball have been used to begin which long range precision rifle event held near Orofino, Idaho?

full_context: Document 1: Boomershoot: The Boomershoot is a long range precision rifle event held near Orofino, Idaho, each year in late spring. The targets are filled with explosives at ranges from 375 to . Shooters are allowed to engage as many targets as they are able during the all-day event. Nearly every year the amount of explosives has increased; in 2004, the amount of explosives put out for people to shoot was greater than all of the other years combined. In 2005, new targets were introduced with smaller amounts of explosives to reduce window breakage in the surrounding countryside. In recent years, the event has also featured an explosive fireball and an Anvil firing to start the event and entertain the participants.
Document 2: Precision Rifle Series: The Precision Rifle Series (PRS) is a precision rifle based shooting sport derived from practical shooting. The series have a championship style where competitors collect points from matches nationwide, and thereby is ranked across the nation. Top ranked competitors get to compete in the last match of the season which is the "Precision Rifle Finale".
Document 3: Tannerite: Tannerite is the brand name of a patented exploding target used for firearms practice, sold in kit form and containing the components of a binary explosive. The explosive comprises a combination of ammonium nitrate and/or ammonium perchlorate (oxidizers), and a fuel - primarily aluminum powder - that is supplied as two separate powders that are mixed by the user. The combination is relatively stable when subjected to forces less severe than a high-velocity bullet impact, such as a hammer blow, being dropped, or impact from a low-velocity bullet or shotgun blast. It is also not flammable – an explosion cannot be created by a burning fuse or electricity. Because it is sold as two separate powders, it can be transported and sold in many places without the legal restrictions that would otherwise apply to explosives. The target system as a whole is the patented, trademarked product called Tannerite, although the term is often used to refer to the explosive mixture itself, and other combination explosives are often generically referred to as Tannerite.
Document 4: Superfiring: The idea of superfiring armament is to locate two (or more) turrets in a line, one behind the other, but with the second turret located above ("super") the one in front so that the second turret could fire over the first. This configuration meant that both forward or aft turrets could fire at any target within their sector, even when the target was in the same vertical plane as the turrets.
Document 5: Snap gun: A snap gun, also known as lock pick gun, pick gun, or electric lock pick, is a tool that can be used to force open a mechanical pin tumbler lock (a common type of cylinder lock) without using the key. A steel rod is inserted into the lock and the snap gun briefly fires the rod against all of the lock pins simultaneously, momentarily freeing the cylinder and enabling it to be turned using a tension wrench. The snap gun is an alternative to a conventional lockpick, which requires other techniques such as raking to free the pins.
Document 6: Range-Shooting: Range-Shooting is a name commonly used in Scandinavia (Danish: "baneskydning", Norwegian: "baneskyting", Swedish: "banskytte") to describe shooting sport disciplines held at permanent shooting ranges where the competitors are lined up beside eachother and shoot during the same predetermined time period at their own stationary targets which are placed at the same fixed distances from match to match. The line consisting of shooters is called the "firing line", while the line consisting of targets is called the "target line". Distances in Range-Shooting disciplines are typically given in round numbers such as 10, 15, 25, 50, 100, 200 or 300 meters, depending on firearm type and discipline. Among the most well known types of Range-Shooting sports are the pistol and rifle disciplines of the International Shooting Sport Federation (ISSF), but there are also many other national and international disciplines which can be classified at Range-Shooting.
Document 7: ISSF 50 meter pistol: The 50 meter pistol, formerly and unofficially still often called free pistol, is one of the ISSF shooting events. It provides the purest precision shooting among the pistol events, and is one of the oldest shooting types, dating back to the 19th century and only having seen marginal rule changes since the 1936. Most of the changes concern distance (30m, 50m, 50 Yards), caliber (.22 .22lr .44CF), type of pistol (revolver only, revolver or pistol, any pistol), and time allowed (16 hours, 6 hours, 3 hours, 2 hours, 1 hour and 15 minutes) and, most recently, format of the finals (carry over scores, start from zero, amount of shots fired in the finals). The target of this event has never changed since 1900, and the distance since 1912. Competitors have been using the single shot 22 rim-fire pistol since 1908. The sport traced back to the beginning of indoor flobert Pistol parlor shooting in Europe during the 1870s, which in turn traced back to 18th century pistol dueling.
Document 8: Anvil firing: Anvil firing (also known in the USA as an "anvil launching" or an "anvil shooting") in the USA is the practice of firing an anvil into the air with gunpowder. In the UK this is where black powder is filled onto the top of the Anvil and ignited. If the Anvil did not shatter it was deemed safe to use.
Document 9: Pike (munition): The Pike is a precision-guided munition (PGM) designed by Raytheon. It is a 40 mm guided munition that can be fired from the barrel of an Heckler & Koch M320 Grenade Launcher Module and Enhanced Grenade Launching Module (EGLM) like a standard 40mm grenade, but is powered by a rocket motor to propel it 2,000 m to give infantrymen extended-range precision capabilities unlike anything before in a hand-held weapon. The weapon uses a digital, semi-active laser seeker to guide itself to within 5 meters of the target; it can operate in a two-man shooter/spotter team or by the grenadier alone lazing after firing, as it can fly for 15 seconds before homing in. When fired, Pike has a small propellant to "kick" it 2.5 - out of the tube before the nearly smokeless motor ignites, and range is dependent on firing angle. The munition is effective against fixed and slow-moving mid-range targets, using a 6/10 lb blast fragmentation warhead with a 10-meter lethality radius. Raytheon developed the weapon for three years in collaboration with Nammo Talley, which developed the warhead and propulsion system. The Pike is intended to be more accurate with a longer range than rocket propelled grenades (RPGs) and standard grenades, while being far lighter and more cost-effective than current infantry guided weapons like the FGM-148 Javelin. Further improvements could include different fuses, multiple-round simultaneous programming and targeting with data-link capabilities, and platform integration onto small boats, vehicles, and small unmanned aerial vehicles (UAVs). Pike weighs 1.7 lb and is 16.8 in long, too long to fit in the breech of the M203 grenade launcher. At AUSA 2015, Raytheon revealed they had performed two successful test firings of the Pike.
Document 10: Back-fire: A back-fire or backfire is combustion or an explosion produced by a running internal combustion engine that occurs in the air intake or exhaust system rather than inside the combustion chamber. Unburnt fuel or hydrocarbons that are ignited in the exhaust system can produce loud sounds even if flames are not present at the tailpipe. A visible flame may momentarily shoot out of the exhaust pipe where the exhaust system is shortened. Fire may also travel into the air intake piping. Either condition may cause a loud popping noise, together with possible loss of power and forward motion. A back-fire is a separate phenomenon from the fire produced by Top Fuel dragsters.
Document 11: ISSF 300 meter standard rifle: 300 metre standard rifle is one of the ISSF shooting events. It is similar to 300 metre rifle but there are more restrictions on the rifle (quite similar to those in 10 metre air rifle). The course of fire is a three positions program of 3x20 shots. This event is based in competitions with army-style rifles, and as such dates back at least to the 19th century, although the early championships had a true army rifle event, using the model of the host country's choice. The standard rifle event as such was created in 1947.
Document 12: Shoot-and-scoot: Shoot-and-scoot (alternatively, fire-and-displace or fire-and-move) is an artillery tactic of firing at a target and then immediately moving away from the location from where the shots were fired to avoid counter-battery fire (e.g. from enemy artillery). The need for such tactics in World War II became obvious from the noticeable smoke signature produced by the use of anti-tank infantry weapons such as the German Panzerfaust anti-tank grenade launcher, the American M1 bazooka and its German Panzerschreck derivative anti-tank rocket launchers, and also by the various models of Nebelwerfer and Wurfrahmen 40 German barrage rocket systems. In modern times, moving after firing is important as there are a multitude of electronic systems, such as counter-battery radar that can automatically detect artillery fire in near real-time and direct counter-battery fire from friendly artillery.
Document 13: Fire loading: The fire loading of a building or compartment is a way of establishing the potential severity of a hypothetical future fire. It is the heat output per unit floor area, often in kJ/m, calculated from the calorific value of the materials present. Fire loading is used for evaluating industrial safety risks.
Document 14: NBA All-Star Weekend Shooting Stars Competition: The Degree Shooting Stars competition was a National Basketball Association All-Star Weekend contest held on the Saturday before the All-Star Game. It involved a current NBA player, a WNBA player, and a retired NBA player competing together in a shooting competition. From 2004 to 2012, players represented their teams' cities. Starting in 2013, the NBA player chose both a WNBA player and the retired player to compete on his team. The competition itself was time based, involving shooting from four locations of increasing difficulty and making all four shots in sequential order. The first shot was a 10-ft bank shot from the right angle, the second was straight-on jump shot from the top of the key, the third was an NBA three-point shot from the left angle and the fourth is a half-court shot. There was a two-minute time limit for each attempt and the top two times advanced to a head-to-head final round. The event was held each All-Star Weekend from 2003–04. In 2007–08, Team San Antonio became the event's first two-time winner. Detroit followed suit in 2008–09 with their second title. In 2005–06, Team San Antonio set the course record with 25.1 seconds. In 2010-11, Team Atlanta became the first team to win the event with a time over one minute. From 2013-15, Team Bosh became the first back-to-back and three time winner. Starting with the 2016 NBA All-Star Game, the contest has been retired and removed from All Star Weekend.
Document 15: Shotgun shell: A shotgun shell is a self-contained cartridge typically loaded with multiple metallic "shot", which are small, generally spherical projectiles. Traditionally lead was used, but increasingly steel, tungsten or bismuth shot has replaced lead, due to laws designed to protect the environment. A single, large projectile known as a shotgun slug can also be used, and numerous specialty rounds such as less-lethal rounds (e.g. beanbag rounds), flechette rounds, lead-dust rounds for door-breaching are also available. An old non-lethal shotgun load consisted of a shotgun shell loaded with rock salt, which could inflict very painful, but rarely deadly, wounds, and was therefore popular for scaring away trespassers.
ground_truth: The Boomershoot