Load data for .221 Rem. Fireball + 55gr Sierra VarmintKing

Based on C.I.P., the max. allowed case length is 1.400 in / 35.56 mm, the max. cartridge length is 1.830 in / 46.48 mm, and the max. allowed pressure is 46,412 PSI / 3,200 bar.

Based on C.I.P., the max. allowed case length is 1.400 in / 35.56 mm, the max. cartridge length is 1.830 in / 46.48 mm, and the max. allowed pressure is 46,412 PSI / 3,200 bar.

Load Specifications

ImperialMetric

Bullet:.224 | 55gr | VarmintKing

Cartridge:.221 Rem. Fireball load data

Case Length (L3):1.397" | 35.5 mm

Cartridge Length (COL/L6):•••

Seated Depth:0.277" | 7.0 mm

Case Capacity:22 gow | 1.43 cm³

Primer Size:Small Rifle (SR)

Max. Pressure (C.I.P.):46,412 psi | 3,200 bar

Barrel Length:24.0" | 610 mm

Min. Twist Rate:1:12.5

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Community Loads for .221 Rem. Fireball + 55gr Sierra VarmintKing

Real loads for this combination shared by our community. Charge weights are only fully visible with an active Pro licence.

Charge (gr)	C.O.L.	Barrel Length	Velocity (fps)	Pressure (psi)

15.3 gr	1.830"	20.0"	2389 fps	•••
15.9 gr	1.830"	20.0"	2474 fps	•••
16.5 gr	1.830"	20.0"	2556 fps	•••
•••	1.830"	20.0"	2639 fps	•••

•••	1.830"	20.0"	2535 fps	•••
•••	1.830"	20.0"	2622 fps	•••
•••	1.830"	20.0"	2711 fps	•••

•••	1.830"	20.0"	2544 fps	•••
•••	1.830"	20.0"	2616 fps	•••
•••	1.830"	20.0"	2687 fps	•••
•••	1.830"	20.0"	2756 fps	•••

•••	1.830"	20.0"	2652 fps	•••
•••	1.830"	20.0"	2725 fps	•••

•••	1.830"	20.0"	2459 fps	•••
•••	1.830"	20.0"	2546 fps	•••
•••	1.830"	20.0"	2632 fps	•••

•••	1.830"	20.0"	2440 fps	•••
•••	1.830"	20.0"	2511 fps	•••
•••	1.830"	20.0"	2581 fps	•••
•••	1.830"	20.0"	2650 fps	•••
•••	1.830"	20.0"	2721 fps	•••

•••	1.830"	20.0"	2475 fps	•••
•••	1.830"	20.0"	2550 fps	•••
•••	1.830"	20.0"	2623 fps	•••
•••	1.830"	20.0"	2695 fps	•••

Charge weights beyond the first rows and all pressure values are only visible with an active Pro licence.