Home Forums Hunting & Shooting Hunting Rifles Kimber 257 Rob OAL constraints

Don't be concerned.

The .257" 100 grain Ballistic Tip is one of the "thicker jacketed" models, and is designed for at least 25-06 speeds.

I know because I've sent quite a few through good sized mule deer and whitetail bucks from a 25-06, and seen them used on older cow elk. Quite often the bullets exited on broadside shots.

In addition, my Kimber MT 257 Roberts shoots 110 Accubonds really well.

Billy, what's your load and how does it shoot.

Thx

Brad,

The 110 Accubond load uses 45 grains of H4350. Not around my notes for exact speeds but seemed like 2950 or thereabouts. 3 shot groups are in the occasional 1/2" range on up to 1" depending on the day.

Mine isn't terribly finicky, likes several 100 grain and 75 grain bullets. Haven't messed with heavier. Love the little rifle.

100 grain Hornady soft point was good for 3 antelope this year. I think 4350 was the powder, but I'm in Mexico and can't look at the box. Maybe my reloading factory (dad) will chime in with the loads.

After the shot-

Brad,

Prairie Goat's 110 grain works well in my Bob's as well. Tis a good one to say the least!!

100 Hornady over H4350 is the load for Cheesys rifle. Same load I use in my Ruger except for seating depth. Quite a difference between the two rifles, but both shoot very well with this load. Sure wish that Ruger was as light as the Kimber.

This is good info. y Roberts is not a Kimber but shoots the 100 gr BT very well and I am too lazy to change bullets.Load is 46 -H4350, Remington brass.

this what they do at 300 yds, so far:

80TTSX at 3375 still has stiff bolt lift but shot well. 100gr Hornady shot 1-1.25 at 3150 and they are a little stiff also....
Dunno
Will back them off just a smidge and call it good as pressures just shouldn't be high at those velocities

Bob- what speed are you running with 46grs ??

May have found my pressure issue...saw this before but thought it was a die or brass issue...... Fired brass is also a PAIN to size, again I was thinking a largish chamber but there was no swelling at the web....
See pics>>

Possibly chatter marks in the chamber? Never had this happen so didn't even occur to me until today.

Confirmed the chamber looks similar so Back it goes to Kimber!

Dave I don't know velocity in this rifle. It's a Ruger Hawkeye and to be honest the first load I put together. OAL is a bit longer than your Kimber i think but not much.

That load gave 3050 or so in a Kimber Select I had.

Looks like you have a chamber issue.

Heading to UPS in a bit!!

Looks the same as the chamber that was on my Kimber 257. I sent it back they told me tough [bleep] it's within specs. I hope it turns out better for you.

If not I will polish it up and use it....

Got it back tonight.
Polished the chamber. Haven't unboxed it yet but I will see how it goes Friday.....

Try 3031 and see if that makes a difference.

Unboxed it and it does NOT look like they did anything.....

Chamber still has the linear chatter marks......

So much for Kimber repair.....👎👎👎

I took it shooting this AM.
I won't know if the little polishing they did helps brass appearance until I get some sized that hadn't already been marred by the chamber. I polished it just a smidgen more last night with steel wool.

Seemed like they didn't stick in the chamber quite as bad but still size hard unless you shoot soft loads.

It shoots well so I am not going to worry about it and I guess the 6 week cross country travel never hurt it....