I don't think that classic division has a box fitting requirement?
Here is an overview of the Classic rules....
Classic division was approved as a class in IPSC at the General Assembly held in October just before the
World Shoot and will join Open, Standard and Production classes from 1 January 2012.
The really short description is:
1911 type all-metal single-stack pistols only, max 8 rounds in magazine for major, max 10 rounds in
magazine for minor, no optics, no comps, no weights, no slide lightening, no weak-hand thumb rests, no
extended dust-cover frames. Magazine wells may not be more than 35mm wide. Holster rules are the
same as Standard gun. Bull barrels allowed. You can change sights and grips.
The full list of formal rules (as approved) is:
APPENDIX D: Classic Division (For evaluation only - expires 31 December 2014 – This means they may
change some of the rules for 2015)
1. Minimum power factor for Major 170
2. Minimum power factor for Minor 125
3. Minimum bullet weight: No
4. Minimum bullet caliber / cartridge case length: 9mm (0.354”) / 19mm (0.748”)
5. Minimum bullet caliber for Major 10mm (0.40”), see below
6. Minimum trigger pull (see Appendix E4) No
7. Maximum handgun size Yes, see below
8. Maximum magazine length Yes, see below
9. Maximum ammunition capacity Yes, see below
10. Maximum distance of handgun and allied equipment from torso 50mm
11. Rule 5.2.10 / Appendix E2 applies Yes
12. Optical/electronic sights No
13. Compensators, ports, sound and/or flash suppressors No
Special conditions:
14. A handgun in its ready condition (see Section 8.1), but unloaded and with an empty magazine
inserted, must fit wholly within the confines of a box which has internal dimensions of 225mm x 150mm
x 45 mm (tolerance of +1 mm, -0 mm). Note that all magazines must comply.
15. The handgun is placed inside the box with the barrel parallel to the longest side of the box. Rear
adjustable sights may be slightly depressed during insertion. 16. Handguns must be based on and visibly resemble the classic 1911-genre design. This means a single-stack, one piece metal frame, and a dust cover (without an accessory rail) which has a maximum length of 75mm when measured from the leading edge of the dust cover to the rear of the slide stop pin.
Magazine well openings cannot exceed a maximum outside width of 35mm. Compliance is checked by
way of a 35mm wide, and at least 5mm deep, notch carved into the outside of the box, or by use of a
ruler or caliper, as approved by the officiating Range Master.
17 Prohibited modifications are slide lightening cuts, weak hand thumb rests and slide rackers.
18. Permitted modifications are those of a cosmetic nature (e.g. custom grip panels, scrimshaw or
similar surface engravings, checkering or serrations etc.), replacement single or ambidextrous thumb
safeties, and any open sights (which may be embedded into the slide).
19. Magazines accessible to a competitor during a COF must not contain more than 8 rounds (for Major
power factor) or 10 rounds (for Minor power factor) at the Start Signal.
20. 357SIG is also an approved caliber for Major, subject to achieving the applicable factor.