I've got two catalogs readily available and several more in 'storage' (lost for now). The '66 has BSA U-9s and Mark XK3 (Yugo Mk-X), FN and Sako, actions, barreled actions and complete rifles.
The '68 catalog has FN, Sako and Tradewinds (FN) actions and barreled actions but no BSA.
I'm REALLY curious now. Neither FN or Mk-X has ever been made for short calibers, they just blocked the back of the magazine and extended the ejector. The BSA did have a short action but it had a .222 bolt face. We still don't know what kind of action is on the OP's rifle!
I think its safe to say that Herter's had dropped the BSA rifles by '68 but didn't have a J-9 in '66. We need fill-in information and a picture of OP's rifle.
I just found and bought a '65 catalog. (Everything is relative--In 1966, a Sako peep sight was $6.75. They sell for $200 now. I just paid $40 for a CATALOG that only cost a Nickle in postage to get for free!!
Jack,
I found catalogs from '76, '77, '78, and '80. The '76 catalog shows both U9 and J9 actions, barreled actions and complete rifles in various 'trim' levels, some offered with Douglas barrels. No other brands of actions/rifles were available. Both U9 and J9 actions were available in three action lengths, 308, -06, and 300 mag. lengths. None had .222 bolt head size. The '77 catalog shows all levels of J9 action based offerings, but has the following 'footnote' regarding the U9, and I quote: "NOTE: ALTHOUGH WE DO NOT LIST U-9 RIFLES, WE DO HAVE A LIMITED QUANTITY OF CALIBERS LEFT. PLEASE WRITE FOR AVAILABLITY AND CALIBERS."
So, it appears that 1976 was the final year for 'cataloged' U9 offerings.
I have duplicate copies of catalogs No. 87 (1977) and No. 88 (1988) Both are in excellent/like new condition. If you are interested, PM me (or email me if you still have my address?) with your mailing address.
As an aside, I back in the '80's, I had an -03 Springfield (four groove) that had been sporterized that had a Herter's muzzle brake installed.