Has anyone had any experience with this rifle? A friend of mine bought one and put a Leupold 3-9x40 on it. Getting no good groups with Winchester 55gr ballistic tip. Only 16 rounds from gun and grouping is getting worst. Got a 1:10 twist in barrel. I wasn't doing the shooting but I pretty sure it wasn't shooter error. Any ideas for a better factory ammo?

Hello
I havent shoot the mossberg, but my Remington 700 didnt like the 55 balistic tips either.
Iwould suggest trying heavier bullets.
For off the shelf ammo, my rifle shoots 80 gr federal blue box real good.
I have worked up a 58 gr load that is acceptable but still get getter groups with heavier bullets.
3/4 inch @ 100 with federals.
good luck.

I have a good friend who bought the ATR in 270. Came with a 12 pound trigger pull. He returned it to the factory and they adjusted it to 8 pounds for him. When the 'new model' came out with the adjustable trigger--- he wanted to pay them to fit one on his rifle. He was told it could not be done. I keep telling him he needs to sell it and get something else but for some strange reason he is a Mossberg fan. Has a basement full of Mossberg shotguns and 22 rifles and now this thing.

I bought several hundred 55 grain Nosler bullets to reload in my .243 Win a few years back. They wouldn't shoot in my Parker Hale rifle for anything. So I did the only sensible thing a guy could do, I built a 1:12 6x47 Rem Stevens 200. I can't get 4000 fps out of them but I do get over 3000 and sub MOA accuracy, and it is more pleasureable to shoot than a .243 Win.

Sorry can't help with the Mossberg, I can't bring myself to buy one. However I used to say that about Savage rifles as well.

My S-I-L and I tried some 55 grain BT bullets in handloaded ammo in his (used to be mine) 243 and they just wouldn't shoot. He switched to 58 grain V-max and it is a tack driver.

The only experience I have with a Mberg 100ATR is one in 270Win that I bought cheap NIB from a guy that won it. I couldn't get groups under 2.5" at 100 yds. until I hand lapped the bore and I might have free-floated the barrel. After doing this it would group a solid MOA all day any day. I would have kept it but I couldn't stand the trigger and no after-market available, at least at that time.

Get several different bullet weights and types, and try them out. Chances are you'll find one that give acceptable accuracy.

If the groups are getting worse, the barrel might be rough inside and need breaking in. Try cleaning it every couple of shots for a while. It may take a while for the gun to produce its best groups if the bore is really rough.

It could also be a scope/mount issue. Make sure all the screws are tight. Since its a Leupold I doubt there's an issue with the scope.

Glad to hear the input on the 55gr bullets. Thanks fellas. I agree with breaking in the barrel. He doesn't want to spend the money or time to do it, but we both agree on trying a heavier grain.

taylorce1: Savage has come a long way haven't they? My mod 12 in 308 has a 26" heavy barrel and is without a doubt one of the finest unmodified rifles after breaking in the barrel.

yes, i was loading the same rifle for a buddy of mine. it was ok the trigger was not that bad. but, the barrel was.. 100 gr. sierra spbt with IMR-4350, all i could get was about 3-4" groups and a lot of flyers. i called the 1-800 number and they said to send it to them. It had to go to Texas. well they called and said it had a bad barrel but didnt have any in stock. they were waiting on some to come from Savage.. I did finally get it to shoot about 1.50" or so. I think it will do better with 70-90 grainers

quote:

Originally posted by griz78:
taylorce1: Savage has come a long way haven't they? My mod 12 in 308 has a 26" heavy barrel and is without a doubt one of the finest unmodified rifles after breaking in the barrel.

I like the way my Savages shoot and the way I can work on them in my garage. I still would prefer to be seen with other rifles though. Anyway I'm working on a .223 for my daughter who is nine next week, and might get a .300 Whisper/AAC Blacout barrel for it. I thinking run some 125 grain Nosler BT in it when she is a little older if she can't shake being recoil shy.

Griz, I'd check to see if the barrel is freefloated.

My son has one in .270 Win.
The barrel was not quite free floated. There was a tiny spot where the stock touched the barrel. After I sanded it out the groups went from 3" to under an inch.

Thanks for the tip. I'll check on that.

a little off topic, but I don't understand your guys rifles not shooting 55 grain Ballistic Tips...

I picked up a couple of thousand of them on a close out at the Shooter's Pro Shop when I was over in Bend once...

they shoot just fine in a half dozen different 243s around here...must be the powder you boys are using..

but I've loaded them from 2000 fps MV to 4000 fps MV...only problem I had with them was in one rifle.. an ADL Rem in 243.. for some reason it didn't like them in the 3200 to 3600 fps range...until I went down to RL 7, IMR 4198, SR 4759 and Blue Dot... which ALL will get them in that velocity range.. and the rifle liked them just fine then...

that ONE rifle has been finicky since day one...but once it finds something it likes, it is a tack driver...so it keeps that barrel.. otherwise I would have just replaced it..

quote:

Originally posted by seafire/B17G:
a little off topic, but I don't understand your guys rifles not shooting 55 grain Ballistic Tips...

I'll be honest, I didn't try very hard with the 55 grain bullets just a couple of different powders. I just decided that I didn't want to use my rifle for varmints. The 95-100 grain bullets my rifle likes will wipe out the occasional varmint just the same as a 55 grain bullet.

ya know Taylor...I find that the 75 grain HP by any manufacturer or the 75 grain VMax are a pretty darn easy bullet weight to get some pretty darn accurate loads out of, regardless of powders..

all the 55 grainers I have will last a long time because they are not my GoTo bullet either...

I spend more time having them duplicating 223 velocities or less than anything else....

My 243s spend more time shooting bullets weighing from 75 to 90 grain more than anything else...

but for a guy who doesn't like to dance around ( like I do) testing and playing with a lot of different bullet weights...they can't go wrong with a 95 or 100 grain load... for everything from "Mice to Moose" as the saying goes..