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Old October 12, 2012, 05:58 PM   #1
Join Date: May 6, 2011
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Help: .270 ammo Mossberg 100 ATR

Looking for some accurate deer hunting ammo for a Mossberg 100ATR .270. I'm going to the range to help my brother in law sight in his rifle on Sunday. It's got a 22 inch barrel and a 1:10 twist rate. What ammo will preform well out of this gun?
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Old October 12, 2012, 06:33 PM   #2
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I'd start with Federal Power-shok 130gr and see if it likes it. If not, Hornady SST 130gr.
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Old October 12, 2012, 06:41 PM   #3
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The weakest link in the accuracy chain is generally the shooter- I know that is the case with me.

Sight your rifle in off a shooting bench with a rest using whatever flavor of expanding ammo you like.... so long as you can get it to group under 2 or 3 inches at 100 yards (should be simple, as nearly all new hunting rifles can do this, unless there is a serious scope/sight issue)...... and then the hard part: shooting up to that standard that you set from the bench, just without the bench.

Three inches at 100 yards is roughly 3MOA, and that sounds HORRIBLE, right?

3 MOA is roughly a 9 inch circle at 300 yards, and if YOU can hold to that with your .270 from field positions, then Bambi does not stand a chance, as his boiler room is bigger than that by a couple of inches. Any commercial 130 grain load that you can group into 3", zeroed 3" high at 100, will allow you to center punch bambi with no holdover to 300..... put the crosshairs at the bottom 1/3 of his chest on close shots, center hold for 200-ish, and top edge for 300.

So to the original question: There being not a lot of time before the season opens to develop a good handload (but plenty of time for next year!), get whatever is inexpensive, easily available and will group under 3" ..... the important part is you putting in enough practice from field positions under field conditions to shoot up to your rifle, at ranges you anticipate shooting at....... We (kids and I) shoot at gallon milk jugs full of water at various distances (50 to 400) before deer season every year, after zeroing the rifles.... I would not waste a whole lot of money buying the 35+ dollar a box stuff when you can buy the plain jain Winchester Super-X stuff for half that ..... twice the practice would be a much better use of resources than the tiny bit of added performance the premium stuff might add.

P.S.- I am astounded at the price of factory ammo these days..... I have been handloading my hunting ammo for a long while now.... the last factory .270 WIN I bought was $12.99.... I can reload better, more accurate ammo than the premium stuff ( launching a 150gr SGK at 2950 f/sec for a 1.25" 100 yard group- and that from a rifle nearly as old as my dad) for less than that.... don't think of that as 1/3 of the cost, though- it's 3X the live fire trigger time!
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Old October 12, 2012, 07:32 PM   #4
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Its gonna be hard to find as accurate ammo for a 270 Win as that loaded by hornady using their SST bullets.

I use it in mine as a target round. Works great on deer. For heavier animals such as Elk I use the 150 Inter bond. It has the same BC as the 150 SSTs but the jacket is bonded to the core, it holds together better then the SSTs on Elk size animals.

I use mostly SSTs because they are cheaper then the IBs but they have the same BC, shoot at the same zero at the same velocity as the IBs of the same weight.
Kraig Stuart
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Old October 13, 2012, 10:40 PM   #5
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I have had good results Remington Corelokt 130gr...
Fat White
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Old October 14, 2012, 02:50 AM   #6
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Are these results with the same gun? And or barrel specs?
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Old October 14, 2012, 07:20 AM   #7
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Yep the Hornady "Custom" ammo with any of their premium bullets will be decent for sure.
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Old October 14, 2012, 02:59 PM   #8
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The Hornady 140 grain Interlock Boattail Soft Point has proven to be by far the most accurate factory ammo out of my 270.
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Old October 15, 2012, 04:43 AM   #9
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The first time out we couldn't get the gun to shoot well at all. I think the barrel just needed to be broken in. This time around the gun did much better. We tried a few different types of 130 grain ammo, and they all shot better than 1.5 MOA. Thanks all, for the advice. I think he's going to stick with some Hornady 130 grain soft points.
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Old October 17, 2012, 12:15 AM   #10
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My .270 shoots MOA or better with remington cor-lokt 130gr. so I never felt the need to try anything else since cor-lokt is usually the cheapest ammo on the shelf.
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Old October 18, 2012, 03:26 PM   #11
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140 gr SSt Superformance

I bought a Mossberg 4X4 last fall in .270 and a box of Hornady Superformance 140 gr. SST, and a box of Winchester loaded with 140 gr. Nosler Accubond. Both boxes shot sub-MOA. I killed a cow elk with the Accubonds, so developed a handload using RL-22 powder to duplicate the factory ammo. The handloads group under an inch as well.
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Old October 18, 2012, 05:31 PM   #12
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Winchester silvertip.
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