I've done quite a lot of tests now and the question sprang to mind "Which is the best?" - To answer that question, I put together a spreadsheet and the results can be seen below.
It makes quite interesting reading, but obviously is just the results of DumboRAT and my testing. However, as we're in similar territory it is probably safe to assume most people could achieve results close to these.
All the results are sorted by best 5 round grouping.
Make | Original Make | Unit | Type | Diameter (MM) best 5 of 6 | Diameter(IN) best 5 of 6 | Who? | Test Date | Notes | ||||||
Western Arms | Colt | Delta Elite SCW | GBB | 14 | 0.549 | SM | 04/06/2005 | All 6! | ||||||
Airsoft Surgeon | Colt | DumboRAT special Infinity based | GBB | 15 | 0.588 | DR | 01/01/2004 | |||||||
Western Arms | Colt | 1911 Series 70 SCW | GBB | 17 | 0.667 | SM | 04/06/2005 | All 6 under 25 | ||||||
Tanaka | Luger | P08 Artillery 8" | GBB | 17.5 | 0.686 | SM | 14/12/2004 | |||||||
Western Arms | Beretta | M92FS Competiton | GBB | 17.5 | 0.686 | SM | 23/06/2004 | |||||||
Western Arms | Beretta | Cougar Warrior | GBB | 17.5 | 0.686 | SM | 19/06/2004 | |||||||
Western Arms | Beretta | Elite CQB | GBB | 20 | 0.784 | SM | 08/05/2004 | |||||||
KSC | STI | 5.5 Hybrid Limited | GBB | 25 | 0.980 | SM | 21/01/2006 | Only 10C | ||||||
Tokyo Marui | Steyr | GB | NBB | 25 | 0.980 | SM | 10/09/2005 | |||||||
Western Arms | Para Ordnance | SCW HRT (Black) | GBB | 25 | 0.980 | SM | 29/05/2004 | |||||||
Western Arms | Beretta | Elite 2 | GBB | 25 | 0.980 | SM | 01/01/2004 | |||||||
Tokyo Marui | Sig Sauer | P226 | GBB | 27 | 1.059 | SM | 27/08/2005 | |||||||
WE Metal | Hi Capa | 5.1 | GBB | 30 | 1.176 | SM | 05/07/2005 | |||||||
Tanaka | Smith & Wesson | M500 8 3/8" | NBB | 30 | 1.176 | SM | 08/06/2005 | All low of aimpoint on 134a | ||||||
Western Arms | Para Ordnance | P14-45 Two Tone | GBB | 30 | 1.176 | SM | 04/03/2005 | |||||||
Kang Nam | Beretta | M9 Dolphin (.12g BBs) | Spring Non Hop | 30 | 1.176 | SM | 14/12/2004 | |||||||
Tokyo Marui | IMI | Desert Eagle | GBB | 30 | 1.176 | SM | 02/06/2004 | |||||||
Western Arms | Wilson Combat | Striker | GBB | 30 | 1.176 | SM | 08/05/2004 | |||||||
Marushin | Mauser | M712 | NBB | 30 | 1.176 | SM | 01/04/2004 | |||||||
Western Arms | Wilson Combat | Hi Cap CQB Special | GBB | 30 | 1.176 | DR | 01/01/2004 | |||||||
HFC | Beretta | M9 M190 | GBB | 32 | 1.255 | SM | 05/02/2005 | |||||||
Western Arms | Strayer Voight | Infinity Expert 5" | GBB | 33 | 1.294 | SM | 19/01/2005 | |||||||
Western Arms | Beretta | M9 HW Olive Drab | GBB | 33 | 1.294 | SM | 17/01/2005 | |||||||
Maruzen | H&K | MP5K | GBB | 33 | 1.294 | SM | 23/11/2004 | |||||||
Tokyo Marui | H&K | MP7 A1 | AEP | 35 | 1.373 | SM | 08/03/2006 | |||||||
Western Arms | Colt | 1911A1 Magna Tech | GBB | 35 | 1.373 | SM | 21/01/2006 | Only 10C | ||||||
Western Arms | Smith & Wesson | 4013TSW | GBB | 35 | 1.373 | SM | 08/06/2005 | Mixed gas - Two clusters | ||||||
Western Arms | Wilson Combat | SDS | GBB | 35 | 1.373 | SM | 04/06/2005 | |||||||
Western Arms | Wilson Combat | MEU 1911 Early Model | GBB | 35 | 1.373 | SM | 04/06/2005 | |||||||
Western Arms | Wilson Combat | Hi Cap CQB Special with LRB | GBB | 35 | 1.373 | SM | 05/05/2005 | 24 for 4 | ||||||
KJW | H&K | USP Tactical | GBB | 35 | 1.373 | SM | 13/10/2004 | |||||||
KSC | Glock | 34 | GBB | 35 | 1.373 | SM | 21/07/2004 | |||||||
Western Arms | Strayer Voight | Infinity Std 6" Single Stacker | GBB | 35 | 1.373 | SM | 08/05/2004 | |||||||
Tokyo Marui | H&K | Mk23 | Spring Hop-Up | 35 | 1.373 | SM | 01/01/2004 | |||||||
Airsoft Surgeon | Colt | 1911 Tuned | GBB | 35 | 1.373 | DR | 01/01/2004 | |||||||
Western Arms | Beretta | M8045 Cougar | GBB | 35 | 1.373 | SM | 01/01/2004 | |||||||
Western Arms | Beretta | 1934 | GBB | 35 | 1.373 | SM | 01/01/2004 | |||||||
Western Arms | Colt | 1911 Mark IV Model 70 | GBB | 35 | 1.373 | SM | 01/01/2004 | |||||||
Western Arms | Para Ordnance | P14-45 Prokiller Combat | GBB | 35 | 1.373 | SM | 01/01/2004 | |||||||
Western Arms | Colt | 1911 TRP Clone | GBB | 35 | 1.373 | DR | 01/01/2004 | |||||||
Western Arms | Strayer Voight | Infinity Expert 4.3" | GBB | 36 | 1.412 | SM | 19/01/2005 | |||||||
Western Arms | Strayer Voight | Infinity Hybrid Comp | GBB | 36 | 1.412 | DR | 01/01/2004 | |||||||
Western Arms | Smith & Wesson | Sigma | GBB | 37 | 1.451 | SM | 14/07/2004 | |||||||
KJW | H&K | USP | GBB | 38 | 1.490 | DR | 01/01/2004 | |||||||
Western Arms | Smith & Wesson | Shorty .40 | GBB | 38 | 1.490 | DR | 01/01/2004 | |||||||
Marushin | Ruger | Super Black Hawk | NBB | 40 | 1.569 | SM | 21/01/2006 | |||||||
SIIS | IMI | Desert Eagle 10" | GBB | 40 | 1.569 | SM | 01/10/2005 | |||||||
Tokyo Marui | Hi Capa | 5.1 | GBB | 40 | 1.569 | SM | 04/06/2005 | |||||||
KSC | H&K | Mk23 Metal slide | GBB | 40 | 1.569 | SM | 20/04/2005 | |||||||
Western Arms | Wilson Combat | Professional Compact | GBB | 40 | 1.569 | SM | 07/02/2005 | 10 shots 10 CM across | ||||||
Western Arms | Jatimatic | NBB | 40 | 1.569 | SM | 05/02/2005 | ||||||||
KSC | H&K | USP Compact | GBB | 40 | 1.569 | SM | 23/11/2004 | |||||||
Tanaka | Ruger | Super Redhawk | NBB | 40 | 1.569 | SM | 05/10/2004 | |||||||
KWC | Walther | P99 | Spring Non Hop | 40 | 1.569 | SM | 01/01/2004 | |||||||
Tokyo Marui | Beretta | M8000 Cougar | Spring Non Hop | 40 | 1.569 | SM | 01/01/2004 | |||||||
UHC | Beretta | M9 | Spring Hop-Up | 40 | 1.569 | SM | 01/01/2004 | |||||||
JAC | Browning | Hi Power Mk3 Target | GBB | 40 | 1.569 | SM | 01/01/2004 | |||||||
KSC | Beretta | M93R II | GBB | 40 | 1.569 | SM | 01/01/2004 | |||||||
KSC | H&K | Mk23 | GBB | 40 | 1.569 | SM | 01/01/2004 | |||||||
Western Arms | Beretta | M84 Cheetah | GBB | 40 | 1.569 | SM | 01/01/2004 | |||||||
Marushin | Derringer | 6mm | NBB | 42 | 1.647 | DR | 01/01/2004 | |||||||
Tokyo Marui | IMI | Desert Eagle Hardkick | GBB | 43 | 1.686 | SM | 08/06/2005 | Very tight 3 shot group | ||||||
Western Arms | Wilson Combat | Hi Cap CQB Special | GBB | 43 | 1.686 | SM | 13/10/2004 | |||||||
KWC | Colt | Python 6" | NBB | 43 | 1.686 | DR | 01/01/2004 | |||||||
Western Arms | Beretta | M92FS Perfect Version | GBB | 43 | 1.686 | DR | 01/01/2004 | |||||||
Marushin | Beretta | M92F | NBB | 45 | 1.765 | SM | 25/03/2006 | |||||||
Western Arms | Colt | 1911A1 Military | GBB | 45 | 1.765 | SM | 08/06/2005 | 3 close pairings - mixed gas | ||||||
Western Arms | Colt | Defender | GBB | 45 | 1.765 | SM | 08/06/2005 | 32 for 4 shots | ||||||
Western Arms | Beretta | Cougar SCW | GBB | 45 | 1.765 | SM | 04/06/2005 | |||||||
Western Arms | Para Ordnance | SCW HRT (Black) | GBB | 45 | 1.765 | SM | 26/03/2005 | |||||||
Western Arms | Beretta | Elite 1A Silver | GBB | 45 | 1.765 | SM | 05/02/2005 | |||||||
Western Arms | Para Ordnance | P14-45 Silver | GBB | 45 | 1.765 | SM | 08/05/2004 | |||||||
Western Arms | Wilson Combat | CQB | GBB | 45 | 1.765 | SM | 08/05/2004 | |||||||
Tokyo Marui | S&W | PC 356 | Spring Hop-Up | 45 | 1.765 | SM | 01/01/2004 | |||||||
Maruzen | S&W | M4506 | NBB | 45 | 1.765 | SM | 01/01/2004 | |||||||
Tanaka | Smith & Wesson | M29 Flatside 3" | NBB | 45 | 1.765 | DR | 01/01/2004 | |||||||
KSC | Beretta | Elite | GBB | 45 | 1.765 | SM | 01/01/2004 | |||||||
KSC | Beretta | M9 | GBB | 45 | 1.765 | SM | 01/01/2004 | |||||||
Western Arms | Para Ordnance | Ultimate Competition | GBB | 45 | 1.765 | SM | 01/01/2004 | |||||||
Western Arms | Strayer Voight | Infinity Xcellerator 6" Hybrid | GBB | 45 | 1.765 | SM | 01/01/2004 | |||||||
Western Arms | Para Ordnance | Ltd | GBB | 47 | 1.843 | SM | 08/06/2005 | Hard kick! | ||||||
Western Arms | Strayer Voigt | Infinity Hybrid Comp 6" | GBB | 47 | 1.843 | SM | 09/02/2005 | |||||||
Western Arms | Strayer Voight | Infinity Xcellerator 5" Fluted Black | GBB | 47 | 1.843 | SM | 08/05/2004 | |||||||
Marushin | Walther | P38 | NBB | 47 | 1.843 | SM | 01/01/2004 | |||||||
KSC | Beretta | M9 | GBB | 47 | 1.843 | DR | 01/01/2004 | |||||||
Western Arms | Para Ordnance | Doberman | GBB | 48 | 1.882 | SM | 08/05/2004 | |||||||
KSC | Sig Sauer | SP2009 | GBB | 49 | 1.922 | DR | 01/01/2004 | |||||||
Western Arms | Wilson Combat | Tactical Special | GBB | 50 | 1.961 | SM | 04/03/2005 | |||||||
Western Arms | Strayer Voight | Infinity SCW 6" | GBB | 50 | 1.961 | SM | 17/01/2005 | |||||||
KJW | Ruger | Mk1 | NBB | 50 | 1.961 | SM | 13/11/2004 | |||||||
KWA | Glock | 19 | GBB | 50 | 1.961 | SM | 08/05/2004 | |||||||
KWC | S&W | M4505 | Spring Non Hop | 50 | 1.961 | SM | 01/01/2004 | |||||||
Marushin | AMT | Automag | NBB | 50 | 1.961 | SM | 01/01/2004 | |||||||
Tanaka | S&W | M629 8" | NBB | 50 | 1.961 | SM | 01/01/2004 | |||||||
Tokyo Marui | H&K | Mk23 | NBB | 50 | 1.961 | SM | 01/01/2004 | |||||||
KSC | S&W | M945 | GBB | 50 | 1.961 | SM | 01/01/2004 | |||||||
KSC | Smith & Wesson | M945 (Black) | GBB | 50 | 1.961 | DR | 01/01/2004 | |||||||
Maruzen | Walther | P99 | GBB | 50 | 1.961 | DR | 01/01/2004 | |||||||
Western Arms | Beretta | M92FS Competition | GBB | 50 | 1.961 | SM | 01/01/2004 | |||||||
Western Arms | Beretta | M84 Cheetah Spy Pack | GBB | 50 | 1.961 | SM | 01/01/2004 | |||||||
Western Arms | Strayer Voight | Infinity Prokiller 3.9" | GBB | 50 | 1.961 | SM | 01/01/2004 | |||||||
Western Arms | Strayer Voight | Infinity GIGANT | GBB | 50 | 1.961 | SM | 01/01/2004 | |||||||
Western Arms | Strayer Voight | Infinity SCW 5" | GBB | 52 | 2.039 | SM | 19/01/2005 | |||||||
Western Arms | Colt | 1911 Mark IV Model 80 | GBB | 53 | 2.078 | SM | 08/06/2005 | |||||||
Tanaka | Colt | SAA | NBB | 54 | 2.118 | SM | 27/10/2004 | |||||||
Western Arms | Colt | 1911 US Army | GBB | 55 | 2.157 | SM | 08/06/2005 | 2 25mm clusters of 3 | ||||||
Western Arms | Beretta | 1934 Silver | GBB | 55 | 2.157 | SM | 05/02/2005 | |||||||
MGC | H&K | P7 M13 | GBB | 55 | 2.157 | SM | 10/01/2005 | |||||||
Western Arms | Para Ordnance | SCW HRT (Parkerised) | GBB | 55 | 2.157 | SM | 08/05/2004 | |||||||
Maruzen | Walther | P99 | GBB | 55 | 2.157 | SM | 01/01/2004 | |||||||
Western Arms | Beretta | M92FS Inox | GBB | 55 | 2.157 | SM | 01/01/2004 | |||||||
KSC | Sig Sauer | PRO 2340 | GBB | 57 | 2.235 | SM | 10/09/2005 | |||||||
Western Arms | Wilson Combat | Tactical Compact | GBB | 57 | 2.235 | SM | 17/01/2005 | |||||||
Maruzen | Walther | PPK | GBB | 58 | 2.275 | DR | 01/01/2004 | |||||||
Tokyo Marui | H&K | USP | Spring Non Hop | 60 | 2.353 | SM | 01/01/2004 | |||||||
KSC | Glock | 18C | GBB | 60 | 2.353 | SM | 01/01/2004 | |||||||
KSC | Glock | 17 | GBB | 60 | 2.353 | SM | 01/01/2004 | |||||||
Western Arms | Strayer Voight | Infinity Ltd 5" | GBB | 60 | 2.353 | SM | 01/01/2004 | |||||||
Western Arms | Strayer Voight | Infinity Xcelerator Compact | GBB | 60 | 2.353 | SM | 01/01/2004 | |||||||
Western Arms | Wilson Combat | Vreaker 12 | GBB | 60 | 2.353 | SM | 01/01/2004 | |||||||
Marushin | Taurus | Raging Bull 8.375" | NBB | 63 | 2.471 | DR | 01/01/2004 | |||||||
Tokyo Marui | CZ | Model 75 | Spring Hop-Up | 65 | 2.549 | SM | 20/04/2005 | |||||||
Western Arms | Beretta | M92FS Perfect Version | GBB | 65 | 2.549 | SM | 26/03/2005 | |||||||
Western Arms | Strayer Voight | Infinity Ltd 6" | GBB | 65 | 2.549 | SM | 01/01/2004 | |||||||
Western Arms | Smith & Wesson | Sigma Metal Slide | GBB | 70 | 2.745 | SM | 04/03/2005 | |||||||
Tanaka | S&W | Model 29 6.5" | NBB | 70 | 2.745 | SM | 01/01/2004 | |||||||
KSC | Glock | 18C | GBB | 72 | 2.824 | DR | 01/01/2004 | |||||||
Marushin | Derringer | 6mm | NBB | 75 | 2.941 | SM | 02/05/2005 | 130 for 5 | ||||||
Marushin | COP | 357 8mm (short barrel) | NBB | 75 | 2.941 | SM | 02/05/2005 | 95 for 5 | ||||||
Tokyo Marui | Glock | 18C | EBB | 75 | 2.941 | SM | 09/11/2004 | |||||||
Tanaka | S&W | PC 629 V-Comp | NBB | 75 | 2.941 | SM | 13/10/2004 | |||||||
Tanio Koba | H&K | VP70 | GBB | 75 | 2.941 | SM | 02/06/2004 | |||||||
Western Arms | Strayer Voight | Tactical Carry | GBB | 75 | 2.941 | SM | 08/05/2004 | |||||||
Marushin | Mauser | M712 | NBB | 75 | 2.941 | SM | 01/01/2004 | |||||||
Marushin | Derringer | 6mm | NBB | 80 | 3.137 | SM | 23/11/2004 | |||||||
KWC | Colt | 1911 A1 Custom | Spring Non Hop | 80 | 3.137 | SM | 01/01/2004 | |||||||
Western Arms | Beretta | M92FS (Early Version) | GBB | 85 | 3.333 | SM | 10/09/2005 | |||||||
Marushin | Taurus | Raging Bull | NBB | 90 | 3.529 | SM | 01/01/2004 | |||||||
Hsu Wei | Browning | Hi Power Mk3 | GBB | 90 | 3.529 | SM | 01/01/2004 |