Home Forums Reloading Big Game Rifles .257 Roberts/100 Gr bullets powder choice.

H100V is the speed champ for me but it’s not temp stable as others at the extremes.

Very nice! I am passsively looking for that exact rifle to match my 6.5x55 and 7x57.
My wifes A bolt medallion likes 42.5 grains of IMR4350 Rem 9 1/2 primer and a Nosler 100 grain BT. COAL is 2.780 due to stupid box magazine. Shoots better than moa though , so its ok I guess.

I have a Ruger Hawkeye in 257 Roberts, but use a powder you don't list.
Imr4064.
I use it under 80 and 100 gr ttsx's.
Several antelope have been taken with the 80 gr load.

I’ll say that I have found the 100 Sierra PH to be a bit soft for the 257 Roberts on whitetail. It’s a small sample, but I killed two nice bucks last season with that load and neither bullet exited. Both deer went down instantly, but there was more meat damage than I like and no exit which I’m not too keen on. Velocity is right around 3k. I will either work on slowing that bullet down a bit, or move to the 117 SGK. Using H414 with good velocity and accuracy results, FWIW.

Since H414 is my all time favorite powder…

44.5 grains H414, Barnes 100 gr TSX or TTSX bullet

Killed many a deer under 150 yards…every one died in it’s tracks like lightning hit them.

per Hanco’s Bob pic request…

I found H414 to be sensitive to temperature changes. Have you tested bullet impact at different temperatures?

Bugger,

Can’t say that I have ever tested for that, or encountered any problems to get my attention. After I sighted it in with that load, and then figured out on target where my 100 grain Ballistic tips hit in respect to the deer load, no more paper has been killed, but lots of sleeping deer and groundhogs have concurred on the accuracy of both. Almost all shots for both have been 100 yards and in, and the shooter has times of slight unsteadiness, so wouldn’t say for sure one way or the other. Good question though.

I’ve used it here in Texas, but nothing in temperatures very cold. Around freezing maybe. I do know that H414 seems to be consistent anywhere from 100 degrees to freezing.

having used a lot of it in the past before it was cancelled, I had the same results...

most accurate out to 500 yds with my fast twist 6mm Rem, was H 414.. even if it had a velocity spread of around 100 fps...

with several different bullet weights...

I like H4350 with 100gn bullets. 46 - 47gn.

I load 100g NPT, 46gn H-4350, WW 163g brass, Fed 210M, @ 2.880 COAL Shot from a 26" Ruger No.1. 3200fps + or - a bit. PBR, on a 6" target out to 300yds.

As others above have said, 4350 is the powder of choice in this application, and H4350 is my favorite of the bunch.
Be aware that chambers and throats of 257 Roberts rifles are quite variable. My first Roberts was a 1976 "200th Year" Ruger tang safety sporter. It shot well, but had a sloppy chamber and a very long throat. My varmint load for that rifle was 43 grains of RL-15 under a 100 grain Speer hollow point, a very long 100 grain bullet. That gave me a little over 3,000 fps.

My current Roberts is a Savage Axis with a 24" E.R. Shaw barrel. It has a short throat, and loads which would be OK in the Ruger would blow primers in the Axis. I don't have my load notes in front of me at the moment, so I can't quote any numbers.

For bullets in the 115-120 grain range I would recommend IMR 4831, H4831, or others in that burn rate range.

One of my late shooting buddies loved 25 caliber rifles. Right after WWII he went to Canada and killed two big whitetail bucks - over 200 lbs. dressed - with his Model 70 in 257 Roberts. He used the 100 grain Sierra flat base spitzer and I think 46 grains of IMR 4350. One shot is all it took.

Have always used 47. 0 gr IMR 4350 with Sierra 100 gr
for my deer hunting in SC.

GreggH

H 4350 and various 100 grain bullets in my two Roberts have given good accuracy and with them I have taken antelope, Mule deer, Whitetail deer and a couple black bear, but with further experimentation each rifle showed top-notch accuracy with different bullet weights and powder.

A red pad Ruger 77 is fond of the Hornady 75 gr V-Max. 42 grs H4895 @ 3325 fps and when the wind is really blowing coyote hunting it is a better choice then my 22-250 with 52-55 gr bullets.

A black pad Ruger 77 has really taken a shine to the Nosler 115 gr Partition bullet. 43-44 grs of H4350 2845 to 2860 fps. (a new batch 2875fps.) That load has accounted for my largest Whitetail buck todate. 280 yard shot, dressed out @ 270 lbs.

So true…my “Liberty Model” has a super long throat as well. A friend has a later 77 Bob that has a really short throat, but mine shoots several factory loads he bought, and my handloads, better than his rifle! Weird!

My REM. Classic Limited Edition loves NBT 100’s sitting on top of 43.5 gr. IMR 4350. Consistently shoots under 5/8 inch @ 100yds.
It is glass bedded and has a Jard set trigger 2.5#’s not set , 3 oz. set

I usually do my load work up work in the summer. I've used W760 quite a bit. Note that W760 and H414 are exactly the same powder.

I have a load with W760 in the 30-06 with the 165 gr. Nosler Accubond bullet that is very accurate. Load was worked up when it was about 105* in the shade. One a cold winter day in New Mexico, that same load took out a nice eating cow elk. Bullet not recovered. When I checked out the sights the day before the hunt, it was 14* above zero. No change in point of impact. The day I shot the elk it was 4* above zero. One shot, one elk.
PJ

H-4350 may be more temp stable, but H-100V is definitely the speed champ.

Where I hunt, temp stability isn't a consideration.

Besides, my H-100V load is very accurate and I like the 100 TTSX at 25-06 speed. It does a job on deer and hogs.

My Roberts is on a LA 700 with 24" Brux, thus the longer than normal COAL.

DF

Some kind of limited edition made for the Winchester Collectors Assoc. Dad left it to me NIB. I scoped it and shot it. Says super grade on floorplate.