I'm hoping to shoot Project #2, the 6.5x55, this weekend, and putting together some loads.

I'm wondering if anyone can suggest a COL for the Sierra 140 gr. HPBT?

The barrel is a Lothar Walther, but don't expect anything--although it would be nice--that specific.

Thanks,

flaco

flaco, with out the gun in hand and checking to see where contact is made in your rifle, that question can only be answered using the reccommended specs from seirra.

It depends on how your barrel was chambered. It could have been done with a short throat or the standard length. FOr the most part, most of my loads are seated to around 3.070 to 3.075", but again, that's in my rifles and may not help you at all. You'll have to determine the proper seating depth on that particular rifle yourself...

Thanks, guys-

Different manuals recommend different COLs.

Sierra doesn't list anything on their site, but Lapua has a downloadable handbook, and they recommend 3.110 for that round.

Actually, all Lothar Walther barrels come long chambered. To fit, the breech face is trimmed to match the receiver, as is the shoulder.

My thinking was that since they're never reamed--by a smith--there might be uniformity there. Within the .006s of correct headspace.

flaco

Sierra Infinity Suite lists the COL for that bullet as 3.050.