Something to remember is the reduction in effective range of Luftwaffe fighters in 1945 imposed by the amount of allied air activity, the aircraft needed to keep more fuel reserves to cope with diversions or loitering waiting for the allied airfield attack to stop. Also the Jumo 004 fuel consumption was poor, more so at high speed, so like the piston types most of the flight was at cruise speeds, throwing a Jumo 004 powered aircraft around the sky was not a good idea, even before talking about the slower throttle response of jets versus piston engines.
When it comes to the Me262 Hitler's 1944 decision meant the bomber units received more of the early production. The bomber units were mostly deployed in north west Germany where the RAF found its fighter top speeds were just good enough to intercept, but like the Luftwaffe trying for Mosquitoes it tended to require a favourable initial situation or the target not noticing the interceptor, as a result the RAF did rat catching sorties, Tempests held at cockpit readiness which when an Me262 was detected by radar would scramble to patrol the probable Me262 base. Luftwaffe deployments meant the RAF largely dealt with Me262 bombers, the USAAF the fighters, and it is important to remember the bomber units when counting Me262 operations and losses.
Operational units, 10 January 1945, II/NJG 11 had some Me262 alongside its Bf110, while stab/KG51, I/KG51 and Kdo Braunegg had 57 between them as of 9 April that became a total of 180 Me262 in operational units,
5 in stab/JG7
41 in I/JG7
30 in II/JG7
37 in I/KG(J)54
30 in Jvb 44
15 in I/KG51
6 in II/KG51
9 in 10. NJG11
7 in Naufl 6
We have two ideas colliding "Me-262 getting properly slaughtered with few results until it got R4M rockets," and "(and it also shows that kill claims are drastically unreliable, particularly from US pilots: I rate them level with IJN in claim credibility, which is also low.)"
We are not given an idea of how low, just a belief. Let us assume it is a 5 to 1 overclaim, like the Luftwaffe in the Battle of Britain or the RAF over France in 1941. We now turn our attention to the maths is fun section of your educational survival guide, right beside the panicking with dignity insert.
Thanks to Ultra and fitting gun cameras in early 1943 the RAF had tightened its criteria so Fighter Command was close to 1 to 1 claims to actual shoot downs, while in 1944 the use of G suits and gyroscopic gunsights further increased the average allied fighter lethality.
According to the Luftwaffe quartermaster January to November 1944 Luftflottes Reich and 3 lost 1,730 aircraft MIA on operations plus 4,535 to enemy aircraft, total 6,265, out of 8,102 lost to enemy action and 12,122 total losses. In the same time period RAF Fighter Command made 1,589 and Bomber Command 486 claims, total 2,075, the USAAF in the ETO listed 7,096 claims in the air, bringing the allied total to 9,171 against the 6,265 available Luftwaffe losses.
Now comes the fun part, dividing the 4,735 USAAF fighter claims by 5 means we are down to 5,383, so those USAAF bomber gunners were shooting down at least 3 times more aircraft than the fighters, while underclaiming and would have been doing much better in 1943 when the average Luftwaffe fighter had less firepower. Heading back to reality in early 1944 the heavy bomber to interceptor loss ratio was about 2 to 1 in favour of the interceptors, apply that and the allied figure drops to 7,578 against 6,265 or around 83%
The above must remain broad, there were other allied formations encountering the western and central Luftwaffe, notably the 15th Air Force, but it does show claims about systematic major allied overclaiming in the time period to be junk.
Gaston's turn fighter idea requires ignoring lots of data.
During 1944 the USAAF ETO fighters were awarded 4.33 claims per reported loss to enemy fighters, in 1945 that climbed to 6 to 1, in raw terms the USAAF fighters claimed 158 Me262 shot down while JG 7 claimed 6 P-38, 9 P-47 and 31 P-51 then add JV 44 etc. About half the Me262 claims appear to be correct and assume 80% of the USAAF ones and you have 127 USAAF to 23 JG 7 plus others. The Me262 were there as bomber destroyers, trying to avoid combat with escorts.
Next on the Gaston missing data is the reality JG 7 flew 5 to 10 times the number of sorties in March 1945 versus February with a corresponding jump in claims and losses, April was similar versus February, if you throw away the big jump in sorties you can claim the R4M to be a wonder weapon and throw in yet more wonder turn fighter ideas. As noted earlier JG 7 was shooting down around 1.3 to 1.4 allied aircraft per combat loss and overall losing 1 Me262 per shoot down, which was significantly better than the piston engine types were achieving at the time. By the way in 1944/45 German aero engine quality made fighter pilots wary about actually using full power.
There are not a lot of allied fighter claims for Me262, it is simple enough to see where the combats occurred. According to John Foreman, RAF claims look something like this, in the air, not around jet airfields unless noted.
1944
27 September, Me262 damaged in air, it pulled away from the Spitfire (A mark IX)
30 September, Me262 damaged by a Spitfire, again a mark IX
2 October, Me262 damaged by a Spitfire, again a mark IX
5 October Me262 destroyed by a patrol of Spitfires, the combat started at 13,000 feet, the jet dived, with some of the Spitfires following it, then it climbed back into the others. Wreck fell into allied territory.
13 October, Me262 destroyed by a Tempest, even though the Tempest was doing 480 mph the jet pulled away but them slowed down and was caught. Again the wreck fell in allied territory. Also on this day another Tempest damaged an Me262 that finally outran the attacker.
21 October Tempests claimed 2 damaged Me262s
28 October Tempest claim for a damaged Me262.
2 November Tempests claimed 3 damaged Me262s.
3 November a Tempest on a test flight spotted 2 Me262s, closed at full power and was spotted too late by the jets, the Tempest was doing 500 mph when it opened fire as the jets began to accelerate, the claim was for one probable kill, later post war research showed the jet was shot down.
4 November, Tempest claimed one damaged Me262 on the ground while Rat Catching, the Tempest returned home.
19 November, Tempests claimed 1 damaged and 1 probable Me262 on the ground while Rat Catching, the Tempests all returned home.
21 November 2 Tempests chased an Me262 from Volkel to the Rheine jet airfield area, claimed it as damaged.
26 November, Tempest Rat Catching, 1st combat 1 Me262 claimed damaged and 1 destroyed on the ground for 1 Tempest shot down by flak and another damaged, 2nd combat 1 Me262 damaged for no Tempest casualties.
3 December, Me262 shot down at zero feet by Tempests, near its airbase. Pilot killed.
4 December, Tempest claim of an Me262 damaged north of its airbase.
10 December, Tempest claim of an Me262 damaged, after diving from 14,000 feet on a pair of the jets at 8,000 feet. It looks like the damaged jet actually crashed, killing the pilot.
17 December, Tempest pursued an Me262 from Helmond to Wesel, finally shooting it down, killing the pilot. The RAF pilot involved was John Wray, who had made the claim for a probable jet on 3 November, making him the only RAF pilot to shoot down 2 Me262s.
23 December a Spitfire IX chased an Me262 from Antwerp to Eindhoven claiming it damaged.
25 December, a Spitfire IXs sent back to escort a fellow aircraft with a failing engine, listened to his squadron mates shooting down Bf109s, decided to work off frustration by doing a power dive near Heesch and pulled out behind an Me262, which was shot down, later a Spitfire IX shot down another Me262, southwest of Aachen and in the same area some Tempests engaged 2 more Me262s shooting down 1. Also some Tempests spotted 5 Ar234s and claimed 1 damaged. Looks like all 3 kill claims were correct.
26 December Spitfire IXs claimed an Me262 damaged near Julich and another near Stavelot.
27 December Spitfire IX claimed an Me262 damaged near Aachen.
1945
1 January, Spitfires claimed 1 damaged Me262 near the Rheine jet airbase 14 January, Spitfire IXs caught an Me262 in the landing pattern at Rheine and shot it down, the pilot parachuting. Also a pair of Spitfire PR.XIs encountered 2 Me163s, with one Spitfire being shot down and 1 Me163 claimed to have crashed, the claim being "by evasion"
23 January Spitfire IXs spotted a group of Ar324s (initially identified as Me262s) in the Bramsche landing circuit and made claims of 3 destroyed and 4 damaged for no losses. At Rheine a Spitfire IX claimed 1 Me262 destroyed on the ground and 1 in the airfield circuit. (As an example of the Luftwaffe cover of the jet airfields 2 groups of Tempests hit the top (11,000 feet) and lower cover (8,000 feet) at Rheine claiming 5 Bf109s and Fw190s destroyed and 1 damaged for no losses, 3 Luftwaffe pilots were killed in this combat)
24 January Spitfires claimed an Me262 damaged near Munster but lost a pilot to flak.
1 February, to reverse things, a Typhoon was shot down, probably by an Me262.
11 February A Tempest chased an Me262 or Ar234 20 miles to Rheine airfield and shot it down near the base.
14 February Spitfire XIVs attacked the Rheine airfield cover claiming 1 Fw190 destroyed, 1 probable and 2 damaged and actually shooting down all 4, covering for 2 of their number who claimed 2 Me262s damaged in the airfield circuit. Meantime 2 Typhoons just reforming after completing a bomb run found 2 Me262s appearing out of the clouds just below them on a parallel course, they shot down both, killing the pilots. Later another Typhoon claimed an Me262 damaged near Emmerich. Also a Spitfire IX stalked 3 Me262s, keeping all but the canopy and the tail in cloud, finally shooting down one and killing the pilot. A Tempest claimed 1 damaged Me262 as it was taking off at Rheine.
21 February an Me262 claimed damaged by a Spitfire near Emmerich and an Allison engined Mustang (Tactical reconnaissance unit) pilot seems to have claimed an Me262 damaged. One of these might be Werke 170099.
23 February Mustang pilot claimed 1 Me262 damaged.
25 February Spitfires operating around Rheine airfield claimed 2 Me262s damaged in the air, along with 9 piston engined fighters shot down, for 1 Spitfire shot down by flak and another lost to engine failure. The German fighter units in the combat lost 10 aircraft and 7 pilots.
2 March a Spitfire XIV spotted an Ar234, dived to attack and shot it down, but over stressed the Spitfire and it was written off on return to base. Tempests found Bf109s and Ar234s at Lingen, claiming 4 Bf109s and 1 Ar234 destroyed plus 1 Ar234 damaged and, after that fight, another Ar234 was claimed damaged near Rheine. The Ar234 unit, 9./KG76 reported 2 losses.
12 March, a lone Spitfire IX sent to "chase away" an Me262 harassing British troops near Wesel saw the jet appear out of cloud just ahead and above, and shot it down in full view of the ground troops.
14 March Tempests claimed an Ar234 destroyed near Quackenbruck.
15 March A Tempest claimed an Ar234 damaged near Rheine.
23 March Mustang pilots claimed 1 Me262 destroyed and 5 damaged mainly while protecting RAF bombers.
24 March, Tempest airfield strikes lost 1 to flak and another possibly to an Me262.
31 March Mustangs claimed 1 Me262 damaged.
9 April Mustangs claimed 5 Me262s destroyed and 2 damaged when protecting RAF bombers.
10 April a Mustang claimed an Me163 over Halle.
11 April Tempests destroyed an unidentified jet aircraft, possibly a He162.
12 April Spitfire XIVs claimed an Ar234 shot down west of Bremen.
14 April a Spitfire saw an Me110 towing an Me163, the Me163 was released but the Spitfire claimed both as shot down.
15 April Tempests shot down an Ar234 taking off from Kaltenkirchen.
16 April 2 Ar234s strafed and claimed damaged at Ludwigshurst
20 April An Me262 claimed destroyed, along with 20 Fw190s and 14 Bf109s in air combat over Germany. An Ar234 claimed destroyed in an airfield strafe.
22 April Night time Airfield strafes claimed 1 Me262 destroyed and another damaged
24 April the first Meteor claim, a Ju88 damaged on the ground.
25 April Tempests claimed an Me262 destroyed over Blankensee airfield, a Spitfire XIV chased 2 Me262s at low level, gaining while doing 400 mph, the pilot assumed the jets were trying to lure him over a flak area, he broke off and waited until the jets were in the airfield circuit, hitting one as it was landing, and watching the other, when trying to land in the opposite direction, lose its starboard undercarriage "Final results of the fire in the first Me262 were not observed owing to intense light flak from the airfield defences."
26 April Typhoons claimed 1 of 2 Me262s that attacked them.
2 May Tempests claimed an Me262 damaged at 50 feet. A Spitfire XIV claimed an Ar234 shot down in the Hohn airfield landing circuit, and another Spitfire an Me262 damaged in the air.
All this assuming I have not missed any in my quick run through.
As a minor aside, stern chase closing speed 180 mph, opening fire at half a mile, 10 seconds of shooting before collision, if you allow 440 or so yards as a limit after which most WWII fighter pilot missed, the 30 mph faster target staring beside you will be out of effective range in 30 seconds, one moving at 60 mph faster who only approaches within 220 yards, 7.5 seconds.
Also complex systems tend to be harder to predict, and the smaller the sample size the higher the level of uncertainty, recent political opinion polling is showing that the most, as people have more diverse backgrounds along with communication and lifestyle options it makes it much harder to find a decent representative sample.
What people know around here is the way those with a predetermined outcome select the evidence to fit.