I have been dealing with this company since it was known as Xelex Explosives. [1950's]
As a youth, I bought thousands and thousands of rounds of 22 rimfire ammo from them @ 59 cents/100.
Later known as Ammomart, then to the present name, Higginson's. They have always
been great to deal with. Thomas, who is gone now, used to offer some very attractive deals, particularly if he knew you.
I once bought 50# of one lot of a very popular surplus powder from him for $8.00/lb, when it was going for about $14.50/lb, regularly.
It is advantageous for several buyers to get their heads together and make up an order to get the free shipping option.
Regards, Dave.