Asssortment of railguns, coilguns and chemguns from dark Forge

RATING SYSTEM:
Some guns have an "HPG" rating, it consists of 3 tests, and results are expressed in numbers, an example:
3/<1/10HPG(s/p/d) translates to: 3mm spall / <1mm penetration/10s drill time.
Below is the explanation of the tests performed, but TLDR:
how likely a projectile is to cause internal dmg / how likely the projectile is to go through armour / how fast a weapon can defeat armour.

Tests are performed at Herculina Proving Grounds. All tests involve shooting at a practice target under controlled conditions. The target is armoured with Martensitic Stainless Steel as a benchmark. The tests:
1. The "SPALL" test - shooting the target's flat nose behind which the only fuel tank is located, the moment the tank bursts, the ship is knocked out. An engine is placed on the center axis of a ship and in line with the prop tank - it serves as a target for a shot. The rating is given in millimeters, and it is based on the maximum thickness of armour a given projectile, at a given velocity, can achieve a reliable single shot knockout.
2. The "PENETRATION" test - shooting the target's flat nose "shield", behind which a radiator (for targeting) and an additional armoured appendage are present. The rating is given in millimeters, and it's based on the maximum thickness of armour a given projectile, at a given velocity, can in a single shot achieve a reliable damage "mark" on the appendage behind the armoured nose shield. For some projectiles it means they pass completely through and can be observed traveling further, for some however it means they send shrapnel fragments or get turned into plasma and impact the appendage - the rating doesn't differentiate.
3. The "DRILL" test - performed with an exact gun on an exact turret, meaning it takes into account the gun's accuracy as well as the intended range at which it's supposed to operate and rate of fire. The test is performed in the same manner as a penetration test. However, the rating is given in seconds, and it is based on how long it takes for a given weapon to "drill" through 1000mm of benchmark Martensitic Steel.