The pics below are of 100 yards and 400 yards. The advanced powder is specifically formulated for the long-range .338 Lapua, although it is also ideal for a range of large magnum rifle cartridges. It seems this powder is going to be real good with the Lapua case. They are suitable for a wide variety of cartridges, from small varmint cartridges all the way up to the .338 Lapua Magnum. The N560 powder is a tubular type with a fairly large grain with dimensions of 1,4 mm length and 1,2 mm diameter. In these instances, it is not uncommon to find the best accuracy with a jump of .200” or more. The burn rate of is slow on the scale of our rifle powders, between the N160 and N165. 338 … The Enduron Line-Up of Five Powders. This popularity is well deserved, as the .338 Win. Now this is a 1.450 diameter 36" long barrel in a block and an aluminum stock. You can use this on a variety of other bullets that include 300 win mag, .260 Remington, and many more. Here is my testing with RL33. To start viewing messages, select the forum that you want to visit from the selection below. Mag., 7 mm Rem. On top of that, it accommodates more than just 338 Lapua Magnum bullets. This rifle powder is also very good choice for handloading the .338 Lapua Magnum when using lighter bullets of 250 grains or less. .338 Lapua - best powder? ... we certainly recommend trying another powder, for the powder type and charge greatly affects the overall accuracy of each individual firearm. Mag. Good performances in most of the belted Magnum cartridges. 24N41 / 20N29 In my 338 AX which is another version of the 338 Lapua Improved, I have found that for my standard throat design, Retumbo offers the best consistancy to top velocity ratio. If this is your first visit, be sure to check out the FAQ by clicking the link above. The Alliant book calls for 97.5 grains in a Regular 338 Lapua with a 300 Sierra. I feel H-1000 is a bit fast burning for this class with at 300 gr SMK anyway. Winchester introduced the .338 in a Model 70 rifle named the "Alaskan" and it has become the most popular caliber used by professional guides in that vast state. As mentioned Rl-25 also works very well as does Ramshot Magnum. I am using Lapua brass, Fed 215 primer, Hornady 285 match bullet and 99.1gr of RL33. N170 is one of the slowest canister-grade powders readily available from any manufacturer. Sure does well in mine. The gun is a custom build with Stiller Tac 338 action , Hart Barrel, Mcrees precision stock, Timney trigger. The gun weighs about 45 pounds. Read somewhere on the hide that was Sierra's accuracy load for that bullet. IMR now offers FIVE Enduron powders that cover a broad range of burn rates. Of course, the main reason why anyone buys a suppressor is to reduce sound. Mag. That's why Alliant Powder® put countless hours of research and development into creating Reloder® 33. IMR Enduron 7977 This propellant is comparable to Hodgdon H1000 and is therefore a real Magnum rifle cartridge powder. Re: What is the best best powder for 338 lapua 300 gr? Now mine is an improved and throated for the 300 grain bullets. Reloading data include calibers such as: the .338 Lapua Magnum. I have a similar setup, 1:9.3, 28" Krieger with badger break on Surgeon action. You may have to register before you can post: click the register link above to proceed. It delivers superior performance in calibers such as .300 Win. I've been using 78.0 of H4350 behind the 300SMK. and the .300 Rem Ultra Mag. N170 Our slowest burning N100 series powder, recommended for the very large capacity cases such as the .300 Weatherby Mag. Don't know about "best". IMR 4166 possesses the fastest burn rate in the Enduron lineup. or .338 Lapua Magnum. is an excellent hunting cartridge and the best balanced of all the .338 Magnums.
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