Daystate Rangemaster 36 grain (25 cal) pellets?

They are still available however, not in the United States. You can still find some online stores in the UK and other European countries that have them for sale. Here is one shop that has them: http://www.aaronwheelergunsmith.co.uk/product/daystate-rangemaster-magnum-177-cal-4-5mm/

Last week, I went to AOA and was stumbled on a dust covered tin of DayState .22 Rangemaster Monster FAC pellets in 25.4 gr sitting in the back of the display case. I bought them because I liked the graphics on the tin and figured they would be a collectors items some day. For all intents and purposes, they are essentially JSB Monsters but instead of a head size of 5.50mm, the DayState pellets have a 5.51mm head size.



 
The Benjamin domes, baracudas and JSBs seem to be almost even. But I think the benjamin domes are a little more accurate. I haven't did any formal testing but to me they seem more accurate. I'm not a big paper puncher except to site in my scope and then I mostly plink. At 120 yards I can hit a 12 oz can at least 9 out of 10 tries and most of then time 10 for 10 using either of the three pellets mentioned.