Home Forums Reloading Big Game Rifles 257 Roberts favorite powder

I use the 257 Bob for medium game, coyotes and pigs, when the opportunity arises. What is the powder most reached for when loading 80-110 grain bullets?

I load 100-120 grains but H4350 is pretty much all I use. IMR4350 was slightly more accurate but H is more temp stable.

I just loaded a bunch of ammo with H4350 and 100 BT's.

Many thanks!

H or I 4350 is always a good starting point with the Roberts. H Hybrid 100V with 100-115 grain bullets shows outstanding velocity in load data but I have never worked with it. I'd like to hear from someone who has.

H4350 has been my mainstay, but Hunter isn't far behind for 100s. For the lighter bullets I use H4895

I use Hybrid 100V in my 257 Super Grade Featherweight Model 70. I shoot 110 Accubonds and 115 Ballistic Silver Tips. Easy one inch groups when I do my part. Haven't used on any animals yet but hope to use one on Antelope and Dear in the near future.

Its like an echo in this thread, IMR or H 4350 for 100 grain bullets, but I load them to +P standards.

H4350

100's....H 4350

120's....H 4831

Another vote for H4350

H4350

I use light loads of H4895.
35 gr, 87 speer HC @ 2.812 OAL, 2814fps.
35 gr, 100 speer HC @ 2.812 OAL. 2722fps.

Also IMR 4350
46 gr, 100 NPT @ 2.912 OAL, 3030fps.

Ruger UL .257 20" barrel.

Thank you!

I have that same rifle. What kind of accuracy are you getting out of the Partition load?

H100V with 100 gr TTSX at 3,250 fps out of my 24" Brux is a killer and shoots half MOA.

DF

I can do 1" - 1.5" from the bench on a good day, but I'm old and half blind . Leupold FX-II 4X33.

I prefer 120's for my Bobs, and they prefer H4831sc

I haven't done a lot of load development. I loaded up 42 grains of H4350 pushing a 115 Partition, got 1.5-1.75 inch groups and called it good. It's a woods rifle that will likely never see more than a 100 yard shot.

Just got home from a Christmas trip to NW AR and Goddard, KS. Temp got down to 5* with ice and snow, now back in LA where it's 83*, A/C running.

All I had was my cell phone, now back at my computer. So, I can post this .257R link and the specific H100V/100 TTSX data.

BTW, this load is a very effective WT/hog killer, it's gunner500's favorite Roberts load. So, if he likes it you know it's gotta be pretty bad...

http://www.24hourcampfire.com/ubbthreads/ubbthreads.php/topics/10163944/6

DF