257 Ackley Imp (40) - looking for good 100gr NBT load

[drgondog]

I have a 257 AI with a Shilen Barrel that shoots consistent 117 Sierra GK and 120 Nosler Partitions into 4 shot groups of 3/4" with 47-47.5gr RL19 and Fed210's plus 50.5-51.5 H4831 and CCI 200's.

Haven't found a 100gr load in IMR4350 and would like suggestions on what powder/primer combo worked best for you

Ditto 110 gr AccuBond -

 

[johnch]

I can't help you .
My 257AI refuses to shoot any 100 gr bullet well
I have stuck to the 115 NBT bullet

Johnch

 

[drgondog]

John - what do you use for the 115nbt?

 

[johnch]

The COL is 2.945"
In my 257 AI I use Rem cases CCI 200 primers and 52.5gr of AA3100
This is a slightly compressed load
I get 2900 fps
Accurate Arms lists 54 grains as max and 48.6 as min
In my curent rifle this load shoots sub 1" for 3 shot groups at 100 yds

Hope this helps

Johnch

 

[drgondog]

thanks John - I've never tried either Rem cases or AA3100.

 

[johnch]

When I started with my 257AI I found 500 new cases at a gun show , the price was right so thats why I use them.

I had the AA 3100 on hand so tryed it .
I liked the results so I bought a 8 lb jug.

Have fun !!

Johnch