I have to respectfully disagree with your post on the inference of the sensitivity of convergence. You make some good points, but ultimately, convergence has minimal importance with shooting a proper Mk108. I will list the order of importance to prove my point:
1. Shot setup. Creating a close quarters <200yd crossing shot. This gives you the best chance to hit the target consistently.
2. Firing early and in front of your target on center. He will fly through your rounds in pieces most of the time. I have to disagree with you here when you say he can easily squeeze through your rounds if not timed properly. It can happen, but it is very unlikely. The rate of fire on mk108 is around 6.5/second. It fires slow but not that slow.
3. Last comes convergence. If you are firing early, on center, and in front of your target, I'm sorry, but the probability of missing him is slim to none regardless of what your convergence is set at with this approach. Convergence will only affect the fringe shots, that aren't on center, and this is ultimately a crap shoot, since sometimes you miss high and other times you miss low.
Having said all that, I prefer 350 because it still gives me the opportunity to land a long range tater instead of just dropping dramatically at the 450yd level.
MK 108 cannon
From Wikipedia, the free encyclopedia
The MK 108 machine cannon
Type Autocannon
Place of origin Germany
Service history
In service 1943–1945
Used by Nazi Germany
Wars World War II
Production history
Designer Rheinmetall-Borsig
Designed 1940
Manufacturer Rheinmetall-Borsig
Produced 1943–1945
Specifications
Weight 58 kilograms (130 lb)
Length 1,057 millimetres (41.6 in)
Barrel length 23 inches (580 mm)
Cartridge 30×90RB mm steel casing
Caliber 30 mm
Action Blowback operation
Rate of fire 650 rounds/min
Muzzle velocity 540 m/s (1,770 ft/s)
The MK 108 (German: Maschinenkanone—"machine cannon") was a 30 mm caliber autocannon manufactured in Germany during World War II by Rheinmetall-Borsig for use in aircraft.
The weapon was developed as a private venture by the company in 1940 and was submitted to the Reichsluftfahrtministerium (RLM—Reich Aviation Ministry) in response to a 1942 requirement for a heavy aircraft weapon for use against the Allied bombers appearing en masse in German skies by then.
>>>>>>>>>>>>>>THIS IS WHAT CAUGHT MY ATTENTION THE MOST WAS THE AMOUNT OF 20MM IT TOOK TO SHOOT DOWN BOMBERS<<<<<<<<<<<<
Testing verified that the autocannon was well-suited to this role, requiring on average just four hits with high-explosive ammunition to bring down a heavy bomber such as a B-17 Flying Fortress or B-24 Liberator and a single hit to down a fighter. In comparison, the otherwise excellent 20 mm MG 151/20 required an average of 25 hits to down a B-17.
The MK 108 was quickly ordered into production and was installed in a variety of Luftwaffe fighter aircraft. It saw first operational service in late autumn 1943 with the Bf 110G-2 bomber destroyers and in the Bf 109G-6/U4.
[edit] Design details
[edit] Ammunition
The cannon used specially-developed 30×90RB mm ammunition—30 mm calibre, 90 mm case length, rebated/reduced rim. Unlike most other weapon rounds, which used traditional brass for the case, the MK 108's ammunition used steel cases. Several types of ammunition were developed, including practice, armor-piercing, high-explosive and incendiary. In operation, however, two major ammunition types were used: Minengeschoß ("mine-shell") and high-explosive incendiary. The Minengeschoß was made by drawn steel (the same way brass cartridges are made) instead of being forged and machined as was the usual practice for cannon shells. This resulted in a shell with a thin but strong wall, which hence had a much larger cavity in which to pack a much larger explosive or incendiary charge than was otherwise possible. The incendiary rounds were also often fitted with a hydrostatic fuse, which detonated when it came in contact with liquid. This was to ensure that the round did not merely explode on the target aircraft's skin, which would cause little damage, but instead penetrated and exploded when it came into contact with fuel or coolant inside the fuel tanks or radiators respectively.
ANGELS10
