SPR&PC are still in existence and, indeed, thriving with well over 100 active members and their own 100m range. That range will shortly be complimented by a second, rather larger and longer range, the lease on which has just been agreed.
Eskdale Hotel in Langholm gets a recommendation from us too. Excellent food and ales at fair prices and the staff are very helpful - in fact they helped us carry our guns up to our room and once started breakfast a little earlier than usual for us so we weren't late getting to the range.
https://www.eskdalehotel.co.uk
https://www.eskdalehotel.co.uk/media/pdfs/Eskdale-Hotel-Food-Menu-langholm.pdf
https://www.eskdalehotel.co.uk/media/pdfs/Eskdale-Hotel-Drinks-Menu-Langholm.pdf
We particularly recommend their Border Chicken – Char Grilled Chicken breast stuffed with Haggis, wrapped in crispy bacon & our special whisky cream sauce. Served with your choice of hand cut chips or Dauphinoise potato and seasonal vegetables
Forgive us our misunderstanding (it's a small brain issue), but is F Open an unlimited class regarding rifle weight? If so, recoil needn't be an issue if the rifle is heavy...
We use Lapua D46 and MME bullets, both of which have rebated boat tails, and find them to maintain accuracy and grouping at longer ranges better than conventional bullets. The MME bullets are quite economical too !
We'd also vouch for Valkyrie rifles. Dave did some minor repair and fettling work on a Remington a while back for us and the quality of workmanship and service were superb. We got to see an AR he was building at the time and it was excellent.
We found that relatively inexpensive S&B 140 grain 2905 FMJ-BT bullets propelled by 45.9 grains of Viht N160 ignited by a CCI large Rifle primer proved remarkably accurate in a 1:8 twist, 24" barrelled Tikka. It's a reasonably stout load of powder so work up to it slowly.
Almost 30 different loads for 7mm Rem Mag, including one we use, published by Reload Swiss at
https://www.reload-swiss.com/en/reload_swiss/service_2/rs_ladedaten_1/index.php?kaliber=7mm+Rem.Mag.&pulver=-&hersteller=-&gew_gesch=gr&gew_ladung=gr&geschw_mass=ft
All the MME bullets we've tried work very well: there is an example group of .338 Lapua we shot displayed on the MME web site. Peter, who makes them, is very helpful and can tweak them according to your needs in most cases. The Wimbledon Match and Chilcotin bullets are excellent value and our 'go to' bullets for every day use. The tipped bullets are superb for long range.