Here it is: 40K role-playing mod.
I have always found descriptions and portrayals of bolt guns to be very unsatisfactory. So I put the most detail into the description of the bolt guns used by space marines.
20mm Adeptus Astartes Bolt Gun, 100 points: Encumberment 8/18, Moving Modifier +2, Re-load 30x2, Rapid Fire Explosive 5/30, 0-18” +2, 18-42”, 42-54” –1, 54-66” –2, 66-78” –3, 78-90” –4, 90-120” –5, direct hit 13+4D6, 1” blast 4+3D6, 2” blast 2+3D6.
Ammo 25 points per 30 round magazine, Encumberment 5.
75 round drum magazine, 70 points, Re-load 75x2, Encumberment 12.5.
Notes: A huge weapon, too powerful for a normal human to use unless mounted on a tripod. The exact details of weapons vary depending on where they are manufactured and for whom, but will generally follow the tried, tested and proven design that has been in use unchanged for centuries. Components are usually machined from blocks of alloy rather than stamped or cast, bolt guns are both very heavy and very durable. Built to withstand severe punishment, heavy use, and to operate in harsh environments; a bolt gun in the hands of an Adeptus Astartes brother is nearly as deadly when swung as a club as when fired, and a newly smithed weapon can expect a service life of many decades. The 30 round magazines and the cartridge cases themselves are usually made of a light, tough polymer, each 20mm round weighing 145 grams, the projectile itself weighing 112 grams. The rocket propelled grenade projectile is spin-stabilised by rifling in the barrel, launched at trans-sonic velocity, then accelerated to over 2.5 times the speed of sound as the solid fuel rocket ignites. The rocket engine makes up just under a quarter of the projectile weight, and the grenade still strikes with over 30,000 joules of energy at its maximum individual-target range. The warhead detonates on impact, scattering lethal fragments over a small radius and punching the carbide tip even further into the target. Bolt rounds are effective against a wide range of targets; a few hits are capable of destroying light armoured vehicles, they will reliably kill heavy infantry, sustained shooting will defeat the heavy powered armour of the Adeptus Astartes, and through sheer volume of fire, even heavily armoured vehicles can have their sensors and mobility crippled. Results of bolt gun fire on light infantry is the very definition of overkill. The ability of a full 10-man squad of rapidly deploying Adeptus Astartes to place 300 bolt rounds on target, to a range of 1000 metres, in the space of a few short seconds, is absolutely terrifying.
_________________Warhammer 40,000 5th edition
The least worst rules for 40K.
The purpose of writing is to inflate weak ideas, obscure poor reasoning, and inhibit clarity.
With a little practice, writing can be an intimidating and impenetrable fog, behind which halftruths and untruths can frolic and procreate unmolested.