Winchester magnum rifle powder is a slow burning magnum ball powder that works well in magnum, overbore cartridges and short magnum cartridges. powder burn rate is similar to hodgdon h4831 and h1000. this is warehouse stored and temperature controlled also and has been used effectively up to 2018. these 8 pound containers are available and sell for $180.55 per 8 pound container plus $25.99 shipping charge for 3 day priority. cash, certified check,usps certified check or personal check only please email me for more details. i do have many other powders for sale varget,rel33,rel25,imr 7828ssc and h869, sfe 223 and many more for sale. BUY 2- 8 pound WMR containers and you will get FREE 3 DAY PRIORITY SHIPPING! hornaday 6th edition used WMR with most cartridges and i will copy the cartridges pages if needed for your load development. the powder meters very easy and fills the case nicely. i used WMR in many 1000 yard bench rest cartridges very successfully for many years.it is still a formidable magnum powder with many great qualities.