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Trying different bullets in a 260 Rem with a 1:8.5 twist barrel. The label on the box of 140 Amax says they require a 1:7.5 twist rate. Anyone used them in a 1:8.5?
Thanks Rob. Have a pound of H4350 per the Hodgdon manual for the 142 SMKs, but neither the Hornady nor the Nosler manuals have any 140gr loads listed for H4350.
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Rob01</div><div class="ubbcode-body">Use the 142 data and work up. Also look up in the <span style="color: #CC0000">Reloading Depot </span>at the top of the page and look in the .260 load thread. </div></div>
This is the most useful thing I've learned about in a very long time.
I exclusively shoot the 140 Amax out of my 260AI. I use an 8 twist CBI barrel and use 42gr of H4350 (fairly light load) and COAL to 2.835. I do believe the velocity was around 2860 fps. I think your 8.5 twist will be alright. Just get some velocity on them.
I have an 1-8 twist benchmark barrel that shoots the 142 SMK and 140 Amax the same at 950yds with 43.5 gr of H4350 in lapua brass, .015 off the lands.
reloading for the .260 is very easy and this caliber likes almost everything.
In my 260 with an 8 twist barrel it shoots the 142 smks,139 lapuas and the 140 smks really good. I tried the 107 smks and they sucked. I use h4350 like everyone else. Good luck