Does anyone out there have a Sierra Rifle reloading manual? If so could I ask for some data for the 257 Roberts Improved W/100 grain bullets?

Also does any one have a Nosler Manual? I would be interested in 100 Grain Bal Tip in the 257 Roberts improved as well.

I know this is rifle data but I'm using it in my encore pistol 257 Roberts Improved barrel.Thanks for any help you can provide.

Rich Jake

.257 Roberts AI.....Sierra Manual 5th Edition....pg. 346....100gr bullets.

Firearm; Savage 12VSS, 26" barrel, 1 in 10 twist.

IMR4895, min. 36.3gr @ 2800fps...max 43.5 @ 3200.

Varget, min. 37.6gr @ 2900fps...max 44.2 @ 3200.

IMR4064, min. 35.9gr @ 2800fps...max 43.5 @ 3200.

RE12, min. 39.1gr @ 3000fps...max 44.1 @ 3200.

AA4350, min. 46.0gr @ 3000fps...max 48.5 @ 3200.

IMR4350, min. 45.2gr @ 3000fps...max 48.0 @ 3200.

RE19, min. 45.8gr @ 3000fps...max 50.4 @ 3200.

IMR4831, min. 47.3gr @ 3000fps...max 50.4 @ 3200.

Ike

[ 03-10-2003, 04:57: Message edited by: IKE ]

Rich,

Nosler 5th, p. 162,
257 Roberts Ackley Improved 40, based on 24" Wiseman barrel, 1-10" twist, Winchester case, Fed 210 primer.
RL15 - 39.0 (69%) @ 2882 to max. 43.0 (76%) @ 3132

IMR4895 - 40.5 (72%) @ 2912 to max. 44.5 (79%) @ 3222

H380 - 41.5 (73%) @ 2798 to max. 45.5 (80%) @ 3028

IMR4350 - 46.0 (81%) @ 2978 to max. 50.0 (88%) @ 3208

VihtN160- 46.0 (81%) @ 2955 to max. 50.0 (88%) @ 3173

RL19 - 45.5 (80%) @ 2818 to max. 49.5 (87%) @ 3088

AA3100 - 48.5 (86%) @ 2896 to max. 52.5 (93%) @ 3216

100-grain Solid Base Ballistic Tip listed as BC of .393, SD of .216

- Eric

257 Roberts Ackley Improved. Nosler #5
Win Cases, Fed 210, 24" 10 twist

100 grain Projectiles
IMR 4350 (MAPT)
46.0 grains 2978fps
48.0 grains 3093fps
50.0 grains 3208fps*
* most accurate load in their barrle

They also tested:
RL-15, IMR 4895, H380, Viht N160, RL-19, AA3100

Let me know if you need any other broken out.
Good Luck

Thanks Guys for the help ! I appreciate it !
Rich Jake