It lasts forever. 300wsm may not drive 180 or heavier bullet at the same vel in a 26" or longer barrel but you cut the barrel down and the short mag really shines. The 300 wsm is most likely the easiest to find of all of these.. 300WSM -vs- 7mmWSM. Both are great. As a rule of thumb, when it comes to hunting, muzzle energy is what many hunters look at when deciding on what caliber of firearm / ammunition to select. ? If this is your first visit, be sure to check out the FAQ for information on posting and navigating the forums. Hence, in 1963 the .300 Winchester Magnum was born. If the majority of your shooting uses 165grs or less than stick with the 7mm. In the WSM .270 fans found a short, powerful, efficient round that could be housed in compact, lightweight short-action rifles and which edged closer to 7mm Rem. Ok-here are two that I have not seen compared...lets hear your opinions. With annealing, I know of 50 plus loadings. Thread starter goindeep; Start date Oct 18, 2007; Oct 18, 2007. For more detailed ballistics information please refer to the exact round in question or contact the manufacturer for the pertinent information. Hodgdon reloading data for the 7mm WSM shows that the 140 grain Nosler Partition spitzer bullet can be driven to a MV of 2979 fps in front of 58.0 grains of H4350 powder. And yes the 300 wsm is equal to the 300 win mag if you compare them right. How does the 7mm wsm compare to the 270 wsm? With a 160 grain bullet the Winchester figures are 2990 ft/s and 3176 ft. lbs. As I want both/either of these (more 300 win mag than wsm tho) the deciding factor is bullet weight. Assuming you're speaking of one of the longer 7mm magnums, rifle length and weight will differ more due to the short action of the wsm. There is a significant difference in the two rounds. Hot on the heels of the .300 WSM, Remington countered with the .300 Remington Short Action Ultra Magnum—or RSAUM for short—based on a shortened version of their 1999 .300 Remington Ultra Magnum cartridge. For all practical purposes....nothing. I cant for the life of me find it again but it went along the lines of bullet weights. Please click the above links to take a look at all of the .300 WSM Winchester Short Magnum and 7mm-08 Remington ammo we have in stock and ready to ship, and let us know any parting thoughts in the comment section below. The 7mm has been around since the 60s and has killed 1000s of big game animals all over North America. True .300 WSM Winchester Short Magnum and 7mm-08 Remington ballistics information can vary widely from the displayed information, and it is important to understand that the particular characteristics of a given round can make a substantive difference in its true performance. The 7mm-300 WSM -- A Champion's Perspective. Generally speaking, the higher the muzzle energy, the higher the stopping power. I only have experience with the 300WSM and I … IMO the 270 wsm offers you nothing in the performance potential department compared to a 7mm mag. Ballistics Comparison for 270 Its got history, the 300 WSM has been around for about 5 years or so. Thread starter #1. If you handload, you can get load your 280 to within 75-100 fps or so of the 7mm WSM. Would a game animal tell the difference... no. You can see some of the differences between the .300 Winchester Magnum and 7mm Remington Magnum cartridges in the photo below. But, please DO NOT confuse it with its relation, the 300 WSM. the 7mm has a higher Ballistic coefficent, which means better long range accuracy but we're talking 400-500 yards before it makes a great difference. Have you ever read an apology for why 50 years of predictions about the warming winters are wrong? It has a rebated rim, bottleneck casing with a 1:9.5 twist … Oct 18, 2007 #1. Furthermore, the muzzle energy of a .300 WSM Winchester Short Magnum round averages out to 3580 ft-lb, while a 7mm-08 Remington round averages out to about 2450 ft-lb. But the 300 WSM is also a great choice. Cartridge Type: Rifle Height: 2.1" Width: 0.535" Average FPS: 3134 Average Energy: 3314 Average Gr: 152 Recoil: 2.06 Power Rank: 4.76 of 20 The 7mm Winchester Short Magnum (WSM) was designed in 2001 by Winchester Repeating Arms Company and Browning Arms Company. Joe it depends on which 7mm bullet you’re comparing. i've never had an antelope go more than a few feet when hit with a .243. The .300 Win Mag takes out a popular competitor I think it is the best 7mm out there when you consider its performance is on par with the 7mm Weatherby mag and it can be chambered for a Shorter action. The WSM chamberings are proving to be slightly more accurate as well. Ballistics between the 2 are a negligible. I’ve used the 7mm RUM a lot, the .300 WSM quite a bit, and I think the new kid on the block, the .300 RCM is cool because it feeds so well. We offer a 100% Authenticity Guarantee on all products sold on our website. I heard the ocean currents named the other day -- there are 6 or 8 major currents. Its got history, the 300 WSM has been around for about 5 years or so. For the 7mm WSM which is based on the .300 WSM case necked down to handle .284″ bullets, Winchester claims a muzzle velocity (MV) of 3,225 ft/s with a 140 grain bullet for their 7mm WSM cartridge; the claimed muzzle energy (ME) is 3,233 ft. lbs. I love my 7mm RM (what the AI is trying to be) but would go with the 30 caliber using a 165 Barnes TTSX and be good for everything out to 500 without a worry. which cal would be best ? 7mm Rem Mag vs 300 Win Mag: Cartridge Sizes. The WSM is an 80 grain case vs 56 for the 308. You may hear it referred to as the .300 Win Mag, the .300 WM, the .300 Mag, or the .300 Winchester. Please note, the following information reflects the estimated average ballistics for each caliber and does not pertain to a particular manufacturer, The 7mm-300 wsm is a wildcat with a slightly longer neck favoured by target shooters. In the U.S. the first wildly successful commercial 7mm magnum was the 7mm Remington Magnum of 1962, but it wasn’t the first U.S. 7mm. To put this into perspective, a Boeing 737 commercial airliner travels at a cruising speed of 600 mph, or 880 fps. The 300 WSM is also a good round but once you pass about 165grs. As far as accuracy, the 300 WSM totally dominates for a 30 cal in 1000 yard BR. I have no doubt the 3000+ fps 150 Barnes bullets in the .270 WSM will do as well as the 2850 fps 175 GRAIN 7MM does on elk , and for me feels quite a bit less recoil. Vince's 7mm-300 WSM drilled a … It's defeating to purpose. 7mm WSM/SAUM Pros: Rockstar ballistics (quite a bit less drop and wind deflection out to a mile than the .300 wm) with less felt recoil(I'd love to have extended range sessions), DTA offers a conversion for 7wsm but it appears that brass may have dried up for it?? All times are GMT-5. I'm really not a fan of the new short fat mags, they don't do anything that the longer mags can't do, they just fit in a shorter magazine/action. the 300wsm is a Very good cartridge but if you are looking at a flat shooting cartridge how about the 7mm wsm or the 270wsm.. check around for ammo availablity as mentioned. The following ammunition cartridge ballistics information and chart can be used to approximately compare .300 WSM Winchester Short Magnum vs 7mm-08 Remington ammo rounds. nakneker. The brass in a 300 WSM is also better. Re: 7mm or .300 WSM in AR10/SR25 platform? I like the .270 WSM alot and it has retired my 1953 Win model 70 with which I hunted since 63 with. has an obvious weight advantage, topping out at 240 grains. The belted cartridge is not going to be quite as accurate as a rimmed cartridge by design.
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