Ok, to the best of my knowledge, there hasn't bee a writeup on this for OU, and it works fairly well, so I guess I'll post the set.
I'm also aware that this set is extremely similar to the Ubers Choice Band set, but it's different enough, and in OU it works quite well too.
http://www.smogon.com/dp/pokemon/scizor
[SET]
name: Cautious Choice Band
move 1: U-turn
move 2: Bullet Punch
move 3: Pursuit
move 4: Superpower
item: Choice Band
nature: Careful
ability: Technician
evs: 248 HP / 8 Atk / 252 SpD
Why this set belongs on site:
- More special bulk than the usual CB Scizor allows it to survive attacks on its weaker defensive stat.
These calcs either show un-STAB'd SE attacks, or some of the strongest neutral attacks in OU. A few have calcs of return damage by Scizor's respective attack.
These calcs are of more common attacks, with less power behind them. I'll add more later.
- Creates more momentum than the usual CB Scizor because it can switch into and survive more powerful attacks.
- Hits defensive stats of 343 Hp / 236 Def / 284 SpD, while still retaining an attack stat of 447 after factoring in the Choice Band, which makes him a well-rounded pivot-point for a balanced or offensive team.
- Can still act as a revenge killer and trapper thanks to CB Bullet Punch and Pursuit.
Set Comments:
- U-Turn should be considered the primary move on this set, since it allows Scizor to act as a scout and hit opponents hard. It increases momentum, allows you to make educated switch-ins, and it allows Scizor to escape if he's caught by a Magnezone.
- Bullet Punch follows since it's the very thing that made Scizor such a powerful force in OU this Gen. It allows Scizor to act as a revenge killer, and it gives the team priority to check things like DD Dragonite.
- Pursuit allows Scizor to hurt Pokemon like Rotom and Starmie when they switch, but it's much less powerful than on the normal CB Scizor, so you should consider carefully when to use it.
- Superpower hits certain Steel-types hard, but with Scizor's attack stat lowered, it's not nearly as powerful as it usually is (sometimes it won't even OHKO 252/252 Bold Blissey after SR damage).
Additional Comments:
- Entry hazzard support, especially Stealth Rock, is a must when using this Scizor, as the increased momentum it generates can be used to force even more switches than CB Scizor usually does. Stealth Rock also damages most of Scizor's counters worse than Spikes.
- Wish support, though not required, is helpful for keeping Scizor in the game. Vaporeon is a good choice for this.
- Scizor appreciates the removal of bulky Steel-types. LO Heatran is perfect for this. Heatran also appreciates Scizor's scouting abilities and the increased momentum of coming in after a U-Turn.
- Bulky Waters, though not as annoying as Steel-types, still pose a problem for this set. Shaymin is a good Bulky Water killer that works well with Scizor and appreciates the scouting and momentum it provides. Celebi is another good choice.
Teammates and Counters:
- Like most Choice Band users, Scizor works well with Pokemon that can draw in moves that Scizor resists, like Ice, Dark, and Dragon attacks.
- Appreciates physically bulky teammates who can sponge the physical attacks that target Scizor's weaker (with this spread) defensive stat. Gyarados, Swampert, Vaporeon, and Rotom-A are all good choices.
- Works best with heavy hitting teammates like LO Heatran, Shaymin, or Gyarados.
- Rapid Spinners are good friends to Scizor. Starmie is one of the better choices.
- Magnezone, Heatran, Zapdos, and Rotom-H stop Scizor cold if they predict correctly.
I'm also aware that this set is extremely similar to the Ubers Choice Band set, but it's different enough, and in OU it works quite well too.

http://www.smogon.com/dp/pokemon/scizor
[SET]
name: Cautious Choice Band
move 1: U-turn
move 2: Bullet Punch
move 3: Pursuit
move 4: Superpower
item: Choice Band
nature: Careful
ability: Technician
evs: 248 HP / 8 Atk / 252 SpD
Why this set belongs on site:
- More special bulk than the usual CB Scizor allows it to survive attacks on its weaker defensive stat.
These calcs either show un-STAB'd SE attacks, or some of the strongest neutral attacks in OU. A few have calcs of return damage by Scizor's respective attack.
0 SpA Bold Celebi's HP Fire vs 248/252 Careful Scizor: 49% - 58.3%
... 8 Atk CB Scizor's U-Turn vs 252/220 Bold Celebi: 105% - 124.8%
252 SpA Timid (No Life Orb) Celebi's HP Fire vs 248 / 252 Careful Scizor: 61.8% - 73.5%
252 SpA Timid (w/Life Orb) Celebi's HP Fire vs 248 / 252 Careful Scizor: 79.3% - 94.5%
Timid LO Starmie's Hydro Pump vs 248/252 Careful Scizor: 51.9% - 61.2%
... 8 Atk CB Scizor's U-Turn vs 4/0 Timid Starmie: 124.4% - 147.3%
252 SpA Modest Choice Specs Rotom-W's Thunderbolt vs 248 / 252 Careful Scizor: 53.4% - 63%
... 8 Atk CB Scizor's Pursuit vs 0/0 Timid Rotom: 64.7% - 76.3% (without a switch) or 85.5% - 101.2% (with a switch)
... 8 Atk CB Scizor's U-Turn vs 252/220 Bold Celebi: 105% - 124.8%
252 SpA Timid (No Life Orb) Celebi's HP Fire vs 248 / 252 Careful Scizor: 61.8% - 73.5%
252 SpA Timid (w/Life Orb) Celebi's HP Fire vs 248 / 252 Careful Scizor: 79.3% - 94.5%
Timid LO Starmie's Hydro Pump vs 248/252 Careful Scizor: 51.9% - 61.2%
... 8 Atk CB Scizor's U-Turn vs 4/0 Timid Starmie: 124.4% - 147.3%
252 SpA Modest Choice Specs Rotom-W's Thunderbolt vs 248 / 252 Careful Scizor: 53.4% - 63%
... 8 Atk CB Scizor's Pursuit vs 0/0 Timid Rotom: 64.7% - 76.3% (without a switch) or 85.5% - 101.2% (with a switch)
These calcs are of more common attacks, with less power behind them. I'll add more later.
Jolly Choice Scarf Flygon's Earthquake vs 248/252 Careful Scizor: 39.7% - 47.2%
... 8 Atk CB Scizor's Bullet Punch vs 0/0 Jolly Flygon: 48.8% - 57.8% (2HKO after SR)
0 SpA (Wish Supporter) Vaporeon's Surf vs 248/252 Careful Scizor: 27.1% - 31.8%
0 SpA (Rapid Spinner) Starmie's Surf vs 248/252 Careful Scizor: 24.8% - 29.7%
... 8 Atk CB Scizor's U-Turn vs 252/4 Timid Starmie: 100% - 118.5%
0 SpA (Defensive) Rotom's Discharge vs 248/252 Careful Scizor: 22.2% - 26.2%
... 8 Atk CB Scizor's Pursuit vs 252/168 Bold Rotom: 40.1% - 47.4% (without switching) or 52.6% - 62.5% (with switching)
... 8 Atk CB Scizor's Bullet Punch vs 0/0 Jolly Flygon: 48.8% - 57.8% (2HKO after SR)
0 SpA (Wish Supporter) Vaporeon's Surf vs 248/252 Careful Scizor: 27.1% - 31.8%
0 SpA (Rapid Spinner) Starmie's Surf vs 248/252 Careful Scizor: 24.8% - 29.7%
... 8 Atk CB Scizor's U-Turn vs 252/4 Timid Starmie: 100% - 118.5%
0 SpA (Defensive) Rotom's Discharge vs 248/252 Careful Scizor: 22.2% - 26.2%
... 8 Atk CB Scizor's Pursuit vs 252/168 Bold Rotom: 40.1% - 47.4% (without switching) or 52.6% - 62.5% (with switching)
- Creates more momentum than the usual CB Scizor because it can switch into and survive more powerful attacks.
- Hits defensive stats of 343 Hp / 236 Def / 284 SpD, while still retaining an attack stat of 447 after factoring in the Choice Band, which makes him a well-rounded pivot-point for a balanced or offensive team.
- Can still act as a revenge killer and trapper thanks to CB Bullet Punch and Pursuit.
Set Comments:
- U-Turn should be considered the primary move on this set, since it allows Scizor to act as a scout and hit opponents hard. It increases momentum, allows you to make educated switch-ins, and it allows Scizor to escape if he's caught by a Magnezone.
- Bullet Punch follows since it's the very thing that made Scizor such a powerful force in OU this Gen. It allows Scizor to act as a revenge killer, and it gives the team priority to check things like DD Dragonite.
- Pursuit allows Scizor to hurt Pokemon like Rotom and Starmie when they switch, but it's much less powerful than on the normal CB Scizor, so you should consider carefully when to use it.
- Superpower hits certain Steel-types hard, but with Scizor's attack stat lowered, it's not nearly as powerful as it usually is (sometimes it won't even OHKO 252/252 Bold Blissey after SR damage).
Additional Comments:
- Entry hazzard support, especially Stealth Rock, is a must when using this Scizor, as the increased momentum it generates can be used to force even more switches than CB Scizor usually does. Stealth Rock also damages most of Scizor's counters worse than Spikes.
- Wish support, though not required, is helpful for keeping Scizor in the game. Vaporeon is a good choice for this.
- Scizor appreciates the removal of bulky Steel-types. LO Heatran is perfect for this. Heatran also appreciates Scizor's scouting abilities and the increased momentum of coming in after a U-Turn.
- Bulky Waters, though not as annoying as Steel-types, still pose a problem for this set. Shaymin is a good Bulky Water killer that works well with Scizor and appreciates the scouting and momentum it provides. Celebi is another good choice.
Teammates and Counters:
- Like most Choice Band users, Scizor works well with Pokemon that can draw in moves that Scizor resists, like Ice, Dark, and Dragon attacks.
- Appreciates physically bulky teammates who can sponge the physical attacks that target Scizor's weaker (with this spread) defensive stat. Gyarados, Swampert, Vaporeon, and Rotom-A are all good choices.
- Works best with heavy hitting teammates like LO Heatran, Shaymin, or Gyarados.
- Rapid Spinners are good friends to Scizor. Starmie is one of the better choices.
- Magnezone, Heatran, Zapdos, and Rotom-H stop Scizor cold if they predict correctly.