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Would welcome advice & recommendations.
Rifle.0.223 Rem Savage 110. 26 inch barrel. 1 in 9 twist.
Bullet 62 grain BT M.
Have tried varget, N140 & TAC, various loads. I cannot achieve decent grouping, even at 100, with this bullet weight & the powders listed.
Would welcome any suggestions regarding powders (those currently available) & weights.
Have about 200 62 grain bullets which I would prefer not to simply discard.

Rifle shoots well with 69 & 75 grain bullets using any of the above powders.

Thanks for any assistance
Yamavira

Is that 62grn BTM a copper bullet?? (Monolithic????)

I've got a Savage M10 in .223. The only jacketed bullets I've ever put through it are 69 and 80 gr. SMKs and 75 gr. A-Max, all with N140. Shoots below moa with all these , though the longer bullets are on the edge of stability long range.

Does the rifle shoot the same with factory ammo? You need to isolate whether it is the bullet, load or rifle. By using factory ammo, any bullet weight, but not mil surp, if the rifle still won't group then there is something wrong with the rifle, probably the bedding. If you are using a 'scope swap it out for a known good one and make sure the mounts are tight.

Sorry, I've just re-read your post and seen the rifle already shoots good with other bullets. For some reason the board won't let me edit my post to delete the second paragraph.

Try playing with seating depth. Sometimes these match bullets don't like too much of a jump to the rifling. Also try a "faster" powder like N130.