Bowling ball core · SWAG
SWAG Unreal Core
Symmetric SWAG core
A symmetric core with mid-lane rev-up and medium flare, built for medium to heavy oil. 2 of the 2 balls with this core are in stock at BowlersMart.
- Symmetric
- RG 2.510
- Diff 0.047

Specs
RG AT 15 LB
2.510
Mid-lane rev-up
53% of the reactive and urethane balls we stock have a lower RG.
DIFFERENTIAL AT 15 LB
0.047
Medium flare
49% of the reactive and urethane balls we stock have a lower differential.
MASS BIAS AT 15 LB
None
Symmetric core
Symmetric cores have no mass bias marker to place when drilling.
| Weight | RG | DifferentialDiff | Mass biasMB |
|---|---|---|---|
| 16 lb | 2.520 | 0.034 | None |
| 15 lbUsed on this page | 2.510 | 0.047 | None |
| 14 lb | 2.560 | 0.040 | None |
| 13 lb | 2.550 | 0.048 | None |
Source: SWAG published specs, as listed on the SWAG Unreal Solid product page. RG and differential change with ball weight; use the row for the weight you throw. The highlighted 15 lb row is the one used on this page.
Balls with the SWAG Unreal Core
2 of the 2 balls with the SWAG Unreal Core are in stock at BowlersMart. Same core, different covers: pick the cover for the lanes you bowl on.
Solid covers
Solid covers grip the lane soonest and suit heavier oil.

SWAG Never Quit AP26 Solid Reactive
Medium to heavy fresh oil
Reactive covers
Reactive covers whose finish is not listed in our catalog.

SWAG Never Quit Reactive
Medium to heavy oil
Where the SWAG Unreal sits
Each dot is a core in balls we stock. Cores close together roll alike; the cover and layout decide the rest.
Navy ring = a ball in your bag. Dashed ring = off this chart, or this same core.
Nearest cores, zoomed in
Navy ring = a ball in your bag. Dashed ring = off this chart, or this same core.
This core 1 Nearest cores Other cores
| Core | Brand | Shape | RG | Diff | vs this core |
|---|---|---|---|---|---|
|
|
SWAG | Symmetric | 2.510 | 0.048 | RG 0.000 · Diff +0.001 |
|
|
Brunswick | Asymmetric | 2.509 | 0.047 | RG −0.001 · Diff 0.000 |
|
|
SWAG | Asymmetric | 2.510 | 0.048 | RG 0.000 · Diff +0.001 |
|
|
Brunswick | Symmetric | 2.501 | 0.048 | RG −0.009 · Diff +0.001 |
|
|
Motiv | Symmetric | 2.500 | 0.045 | RG −0.010 · Diff −0.002 |
|
|
DV8 | Asymmetric | 2.498 | 0.047 | RG −0.012 · Diff 0.000 |
Matches use 15 lb RG and differential.
Drilling and tools
Turn on JavaScript to compare with your ball.Balls with the SWAG Unreal Core2 of the 2 balls with the SWAG Unreal Core are in stock at BowlersMart. Same core, different covers: pick the cover for the lanes you bowl on.Solid coversSolid covers grip the lane soonest and suit heavier oil.
Questions bowlers ask
What is the RG of the SWAG Unreal Core?
At 15 lb the SWAG Unreal Core has an RG of 2.510. It ranges from 2.510 to 2.560 across the listed weights.
What is the 14 lb RG of the SWAG Unreal Core?
At 14 lb the RG is 2.560.
What is the differential of the SWAG Unreal Core?
At 15 lb the differential is 0.047. This is a symmetric core, so mass bias is not applicable.
Which bowling balls use the SWAG Unreal Core?
SWAG Unreal Solid Bowling Ball, SWAG Unreal Bowling Ball. 2 are in stock now.
How do the SWAG Unreal Core specs change by weight?
At 16 lb: RG 2.520, differential 0.034. The 12 lb values are not listed.
How does the SWAG Unreal Core compare with my ball?
Type the ball you throw into the Compare with your ball box on this page. It shows the RG and differential side by side and saves your bag for every core page.
Sources and method
Specs. SWAG published specs, as listed on the SWAG Unreal Solid product page, as published by the manufacturer.
Baseline. The baseline is 212 in-stock, published reactive and urethane balls. Plastic and polyester covers, 2-piece, 3-piece and pancake cores, missing covers and missing RG or differential values are excluded.
Percentiles. Percentiles are the share of baseline balls with a strictly lower or higher value; ties are not counted.
Nearest cores. Nearest cores are ranked by distance on standardized 15 lb RG and differential, with the same symmetric or asymmetric shape preferred among near ties (distance bands of 0.1).
Mass bias. Mass bias is compared among asymmetric balls with numeric mass bias only.
Updated. Catalog and page updated 2026-10-16.


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