Solitary Man

originally posted by bspencer:

based on 150 grain bullet

7mmWSM
200 yrds 2648 FPS 2335 ft lbs
300 yrds 2396 FPS 1911 ft lbs

270WSM
200 yrds 2601 FPS 2252 ft lbs
300 yrds 2350 FPS 1839 ft lbs

300 mag
200 yrds 2636 FPS 2314 ft lbs
300 yrds 2442 FPS 1827 ft lbs

270
200 yrds 2336 FPS 1817 ft lbs
300 yrds 2442 FPS 1827 ft lbs



I don't really care whether or not a 7mm WSM is better than a 270 or 300 WSM or whatever.I'd simply like to point out that there's something wrong with the numbers above. For instance, if they're all 150gr.bullets of like kind, then a 150 gr. 7mm bullet is going to have a higher ballistic coefficient than a 30 caliber bullet and, therefore, retain velocity and energy better over distance. Yet above, the 7mm bullet, while traveling faster at 200 yards, is slower at 300 yds.than the 30 cal. This isn't possible if the bullets are the same kind. The bullets must be of a different kind in each example or else the numbers are wrong. Regardless, it makes the comparison less than valid.

More obvious than that, however,is the 270 example. The velocity is higher at 300 yards than it is at 200. Is there some sort of self propelled bullet out there I don't know aboutthat gains speed as it leaves the muzzle? If so I'd like to know about it.

Please recheck the numbers and repost. And if you don't mind, list the bullet used in each cartridge.

James B

The 7MM WSM will not outshoot the other two if you use bullets with equal Sectional Density for each caliber. That doesn't mean that there is anything wrong with any of them. Its just that when you compare, you have to give them all a fair shake. I don't have the figures in front of me but you would prabably need to use the 130 or 140 for the 270 and the 165 0r 180 for the 300 to get equal SD's to compare the three.

I get plenty of performance from the standard 270, 280 and 308 for my needs but I did consider the 300 WSM and still have it in the back of my mind. I just need to think of a logical reason for the purchase. (Besides I want One)Since I am retired, the wife brings in more income that I do so she gets to vote.

redsox3624

well said frizz

I think in actuality the 7mm WSM offers nothing over the established 7mm Rem Mag. The 300 WSM is only popular because it came out first and was the latest and greatest, but it offers nothing over the 300 Win Mag. The 270 WSM offers better ballistics over the 270 Win, and costs less then the 270 Weatherby Mag so it is the only WSM that actually fills a niche.

J Bolt 7mm

270 wsm 130 gr Nosler BT
300 wsm 165 gr Nosler BT Solid Base
7MM wsm 140 gr Nosler BT









P270WSMB

PREMIUM VITAL*SHOK®


P300WSMS1

PREMIUM VITAL*SHOK®


P7WSMB

PREMIUM VITAL*SHOK®


Load Details










Federal Load No.

Factory Primer No.

Caliber

Bullet Weight
Grains / Grams

Bullet style

Use

T.B*




P270WSMB

215

270 Win. Short Magnum

130 / 8.42

Nosler Ballistic Tip

2

24




P300WSMS1

215

300 Win. Short Magnum

165 / 10.69

Nosler Solid Base BT

3

24




P7WSMB

215

7mm Win. Short Magnum

140 / 9.07

Nosler Ballistic Tip

2

24




Velocity in Feet Per Second


Load Number

Muzzle

100

200

300

400

500


P270WSMB

3300

3066

2844

2632

2430

2238


P300WSMS1

3130

2904

2690

2486

2290

2104


P7WSMB

3310

3099

2897

2704

2520

2342




Energy in Foot Pounds


Load Number

Muzzle

100

200

300

400

500


P270WSMB

3143

2714

2334

2000

1705

1445


P300WSMS1

3589

3090

2651

2263

1921

1621


P7WSMB

3406

2985

2609

2273

1974

1705




Wind Drift in Inches 10 MPH Crosswind


Load Number

100

200

300

400

500


P270WSMB

0.8

2.6

6.0

10.8

17.5


P300WSMS1

0.6

2.7

6.2

11.4

18.7


P7WSMB

0.7

2.4

5.3

9.6

15.3




Average Range


Load Number

50

100

200

300

400

500


P270WSMB

-0.3



-2.2

-8.7

-20.2

-37.7


P300WSMS1

-0.3



-2.6

-10.1

-23.1

-42.9


P7WSMB

-0.3



-2.1

-8.4

-19.4

-35.9




Long Range


Load Number

50

100

200

300

400

500


P270WSMB

0.2

1.1



-5.4

-15.8

-32.2


P300WSMS1

0.4

1.3



-6.1

-17.8

-36.3


P7WSMB

0.2

1.1



-5.2

-15.2

-30.6




1-Varmints, Predators, Small game, 2-Medium game, 3-Large, Heavy game, 4-Dangerous game, 5-Target shooting, Training, Practice

SHoNUFF

why go with 7mm when the 270 and 300 cover everything and are gaining ground as popular rounds for the novice hunters.

hillbillyhunter1

http://www.federalcartridge.com/default.asp?pg=27&firearm=1

I bought a 7mm wsm last year based upon ballistic charts that I studied, particularly the one above and to me it appeared that it was comparable to the 300 win., 300 wsm, and 7mm (regular) out to 200 yds and outclassed them all at 300+. I did a dozen different comparisons and it looked like it won out in energy, velocity, drift and drop. The only caliber that was "better" to my way of thinking was the 7mm stw which they did not make in the gun model I purchased. The only real negative I see is the current price of ammo for it which will probably get worse if it continues to lag behind in overall popularity. I kind of like having a caliber that is rarer than most, but I'm definately gonna have to start reloadin'. sorry I couldn't put up all the charts but if you go to that website you can pick and match any caliber against any other with any and all cartridges that federal makes
hb

bspencer

I have seen those same charts as you jsut posted and all of them show the 7mm WSM outperforms them all at 300+yrds........ and is very comparable from muzzle -300yrd

bspencer

http://www.shortmags.org/shortmags/7wsm-detail.htm

bspencer

http://www.browning.com/products/fea...etail.asp?ID=5

Scott Gags

I feel the WSM is the best choice if you you have decided you are going to go 7MM. Itis in a dead heat with thelarger STW and 150 to 200 FPS ahead of the 7MM Remington Mag. The fact that it is available in the short action rifles makes it a better choice than the 7MM Remington Mag even without the better ballistics. This cartridge can deliver 2097lbs at 400 yards with Federal ammo with 160 Grain accubond bullets. That is better than the 300 Winchester Mag can deliver with factory ammo. I cannot understand why this is not selling circles around the other 7 MM offerings.