I am going moose hunting for the first time this fall and don't know what weight of bullet to use. I will be shooting a 300win mag. I have it sighted in with 150 grain bullets right now but am thinking of resighting it in with 180 or 200 grain. Any thoughts. Thanks.

I answered up in questions forum..

Generally you'll be shooting shorter distance for Moose. My choice would be the 185 grainer in Berger Bullets. Second choice the 210 grain.

Do you handload?  If you do, try Barnes TSX 180s.  If not get the best 180 grain bullets you can find for penetration.  Moose are big animals and you might need to pass through a large muscle mass to reach the vitals.  Nosler partitions are an older but still fairly good bullet.  So are Speer Grand Slams, and several others.  Just remember that each different load will shoot differently from your rifle.  If you even MAY be shooting from distance, test whatever you choose at the range.  And good luck!

180 gr Nosler Partitions are as good as it can get for moose as most are taken under 100 yds.

The 190 grain Interlock SP's or their 180 or 220 Grain Roundnose (if they shoot well out of your rifle) by Hornady will not disappoint on Moose with 300 Mag load

I vote for the Nosler Partition I have used them for 20 years and have never been disapointed

I'd also go with the 180 grain projectiles,.. IF you hand load find the combo that will perform best out of your weapon,.. If you don't,.. work with a high quality ammo manufacture like Hornady Custom loads or another name brand that is similar.

GOOD Luck on tagging that moose,.. Good hunting to you,..

most 150's are designed for light animals and as such should be limited to deer class animals in use. i've never seen a conventional or bonded one pass through even a caribou unless the caribou was very small. they' really aren't designed for larger game.

moose are often shot at close range, but can be shot at ranges up to 400 yds. don't worry about it, for the most part, unless you use a round nose, your trajectory from a 300 is as fine as you'll need anyway with a 180.

as for bullet,
nosler partition, x family (and all imitations), swift a frames will all provide the penetration you need, however i've seen a 180 pspbt hornady interlock (not bonded or GMX) pass completely through an alaskan bull (largest member of the moose family) while breaking 2 ribs (1 each side) and leave a 4 inch exit hole.

Norma makes a 180 and 200 grain bullet that will do the job and do it with authority. They are more of a cost but other than handloading they are the most precise you can buy in a factory load. Each component is weighed individually and then the round is put together and then they are lot numbered for that days production so when I buy I always look to make sure I am buying ever how many boxes from the same lot number.

I shot a 55" Ontario Bull with 180gr. Accubonds, which were made for Winchester, but are Nosler partition bullets. First shot dissintegrated the heart on a straight on shot,(never found a piece of heart), second shot through both lungs, found pieces of bullet under skin on far side. Big F'er
 down! Can't vote against Nosler.

150's are okay for deer on longer range shots. Moose require a little heavier bullet. 180 or up to 220gr. would be better. Use a good quality round so you don't have to hole it too many times to get the job done. A good rule of thumb........ if you can't get the job done with one shot .... pass it up.