Not all slingshot ammo is the same — and using the wrong type for your purpose wastes shots and kills accuracy. Steel ball bearings hit hard and fly true for hunting and serious target work. Biodegradable clay balls are the safe, eco-friendly choice for high-volume backyard practice. Glass marbles split the difference with heavier mass and good consistency for target shooting. This guide breaks down the best options in each category so you can match your ammo to how you actually shoot.
Steel
BC Precision 3/8" Steel Slingshot Ammo (100 Qty)
Hunting & TargetBest standard steel for all-around use
Grade A carbon steel balls with no flat spots for consistent accuracy. The 3/8 inch size fits virtually every slingshot pouch and delivers serious velocity for both target shooting and small game hunting. A reliable everyday choice from a trusted US seller.
Pros
- Grade A — no flat spots
- Fits all standard pouches
- Suitable for hunting and target
Cons
- Carbon steel will rust if stored wet
- Smaller count than bulk options
BC Precision 1/2" Steel Slingshot Ammo (100 Qty)
HuntingBest large-caliber steel for hunters
Half-inch steel delivers significantly more impact energy than 3/8 inch — the preferred choice for small game hunting. Same Grade A quality from BC Precision with perfectly round balls and no flat spots for accurate flight.
Pros
- Higher impact energy than 3/8"
- Perfectly round for accurate flight
- Trusted BC Precision quality
Cons
- Requires heavier bands
- Harder to find in bulk packs
Clay
SimpleShot Clay Slingshot Ammo 3/8" (500pcs)
PracticeBest biodegradable clay for practice
All-natural non-toxic clay that dissolves in water. SimpleShot's magnetic clay delivers consistent accuracy, and the 500-count bottle gives you enough for extended sessions without cleanup. Made by the most trusted name in slingshot accessories.
Pros
- All-natural biodegradable material
- Magnetic for consistent weight
- 500pcs in reusable bottle
Cons
- Slight color and shape variation per batch
- Not suitable for hunting
Timbocca Clay Slingshot Ammo 3/8" (400pcs)
BeginnersBest value clay for high-volume practice
Smooth ceramic-coated clay balls that keep hands clean while shooting. Timbocca's consistent sizing fits all standard pouches and the 400-count pack is ideal for beginners building repetition without the ricochet risk of steel.
Pros
- Smooth ceramic coating
- Consistent sizing for all pouches
- Safe — shatters on hard surfaces
Cons
- Some balls may have minor imperfections
- Breaks down faster in humid storage
Glass
Koltose by Mash Cat Eye Glass Marbles 5/8" (1000pcs)
Target ShootingBest glass ammo for target shooting
Cat's eye glass marbles in 5/8 inch — heavier and more consistent than clay for precision target work at 10-20 meters. The cat's eye pattern makes them easy to spot after shooting, and the 1000-count bulk pack keeps you stocked for long sessions.
Pros
- Easy to spot after shooting
- Heavier mass for mid-range accuracy
- 1000pcs — great value bulk pack
Cons
- Shatters on very hard impact
- Heavier than steel — slower velocity
TSY TOOL Glass Marbles 5/8" (500pcs)
ValueBest bulk glass for practice sessions
Premium assorted-color glass marbles at a budget-friendly price. Five pre-divided bags of 100 make it easy to rotate fresh ammo. Consistent sizing and smooth surface provide reliable flight with any standard slingshot.
Pros
- Budget-friendly bulk price
- 5 pre-divided bags of 100
- Consistent size across the pack
Cons
- Not purpose-built for slingshots
- Slight variance in roundness
Frequently Asked Questions
What size steel balls are best for slingshots?
3/8 inch (9.5mm) is the most popular all-around size. It fits standard pouches, delivers good velocity, and works for both target shooting and small game hunting. For hunting larger game or maximum impact, upgrade to 1/2 inch steel — it hits harder but requires heavier bands to shoot effectively.
Is clay or steel slingshot ammo more accurate?
Steel is more accurate. Grade A steel balls have tighter size and weight tolerances than clay, which produces more consistent flight. Clay ammo has slight variations in size and density that affect trajectory, especially at longer distances. For serious target work, use steel. For casual practice where accuracy matters less than safety and convenience, clay is the better choice.
Can I use glass marbles as slingshot ammo?
Yes. Glass marbles in 5/8 inch are a popular choice for target shooting. They're heavier than clay for better mid-range accuracy, and they won't ricochet dangerously on hard surfaces like steel can. The downside is that glass can shatter on very hard impact, leaving sharp fragments. Don't use glass for hunting — steel penetrates more effectively.
What slingshot ammo is best for hunting?
Steel ball bearings are the standard for slingshot hunting. 3/8 inch steel works for squirrel and rabbit at close range. 1/2 inch steel delivers more energy for larger small game. Always check local hunting regulations before using a slingshot for game.
How do I store slingshot ammo?
Steel ammo should be stored dry — moisture causes rust, which creates surface irregularities that affect flight. A sealed container with a silica gel packet works well. Clay ammo is moisture-sensitive and should be stored in a sealed bottle away from humidity. Glass marbles have no special storage requirements beyond keeping them contained.