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MOSSBERG 100 ATR REVIEW 

Mossberg 100 ATR  Bolt Action Rifle Review

  • Top loading, 4+1 magazine
  • Integral synthetic trigger guard for easy cleaning and maintenance - (Not a fan of this option)
  • Side lever safety for convenience and to assist in safety afield
  • Factory installed Weaver-style scope bases (Nice plus)
  • Integrated swivel studs for quick-release sling swivels (OK with these... still not sure about them)
  • Free-floating button-rifled barrels for supreme accuracy
  • Recessed muzzle crown provides protection for consistent accuracy
  • Barrel finishes include matte blued or Marinecote™ (Model tested is blued)
  • Rugged synthetic stocks include black, camo and synthetic walnut finishes (Black synthetic was model tested)
  • Rubber recoil pad aids recoil reduction and stable positioning (Not a fan of the factory pad)
  • Caliber rifle tested : .30-06 Springfield

Cartridge Specs:  

Case Capacity 68 grains H2O

 Overall Length 3.34", Case Length 2.494",

Bullet Diameter .308" Shoulder Diameter .441"

Base Diameter .471", Rim Thickness .049"

Neck Diameter .340" Maximum Pressure 60,200psi,

Rifling Twist 1-10"

First Impressions: Recently picked up one of these rifles in a trade, and well it's not too bad a rifle. I am actually surprised at the smoothness of the action, and the feel of the gun. This used one has some spots on the barrel, and the Mossberg has been removed from the bolt body, but the bore and rest of the rifle is in good shape. I checked the stock to metal fit, rather good for a low end rifle in fact if it had a detachable trigger guard, and a better recoil pad that fit it would be really nice little stock. The trigger pull is not perfect but better than many of  the low end rifles I have shot , and let's off at about 3-4 lbs which is usually not bad either.

Scope For The Rifle: Found a Simmons 8 - point 3-9 x 32 that was sitting around doing nothing... I have had it on several rifles, so I mounted it on this rifle to see how it looked .... in a way... kind of looks like it is where it belongs so I will see how it goes. Can always change it out later. I think I would love to have one of the old Weaver fixed powers that had a steel tube.... say about a 4 or 6 power. Anyway the scope issue is settled for now with the mounting of the Simmons. Took the gun out and test fired it.... the rifle is on target ... hitting paper with very little adjustment.

Reloading the .30-06 Cartridge: I ordered a set of Lee Collet Dies, Lee Factory Crimp Die, and another turret disk for my press. I am going to work up some loads for this rifle, and this will be the first time that I have reloaded the .30-06 cartridge.

January 3rd 2011: Hit a snag in this project as the extractor on the Mossberg has broken during the reloading phase of the project. The piece broke when trying to remove a case stuck in the chamber. I contacted Mossberg and they are sending a new piece for the rifle.

January 10th 2011: Received the new part for this gun, but didn't have the spring detent ball! So I had to scavenge around to find one that I could use for this rifle. I am not a fan of this rifles extractor.... I think that it could be made of better metal. We will see how it holds up as I test several hand loads.

January 12th 2011: I now have several loads worked up for this rifle.... they are as follows...........

Hornady 150 grain SST                                                                              

46.2 Grains TAC  ( 3.1 Lee Dipper )   Max. Load                                                        

Winchester Large Rifle Magnum Primer                                                

Federal Brass                                                                                                    

COAL- 3.192"                                                                                                   

Velocity-    2,964 fps.                                                                                                       

Hornady 150 grain SST

56.5 Grains Big Game ( 4.0 Lee Dipper )

Winchester Large Rifle Magnum Primer

Federal Case

COAL- 3.211"

Velocity-


Hornady 150 Grain Interlock SP #3031

49.8 Grains AA 2520 ( 3.4 Lee Dipper ) Max. Load

Winchester Large Rifle Magnum Primer

Remington Case

COAL- 3.106"

Velocity-  3,067 fps.


Hornady 150 Grain Interlock SP #3031

53.7 Grains IMR - 4064 (4.0 Lee Dipper) Max. Load

Winchester Large Rifle Magnum Primer

Remington Case

COAL- 3.110"

Velocity- 2,974 fps.


Hornady 150 Grain Interlock SP #3031

42.6 Grains Reloader 7 ( 3.1 Lee Dipper ) Max. Load

Winchester Large Rifle Magnum Primer

Remington Case

COAL- 3.112"

Velocity-  3,015 fps.


SPEER 150 Grain RN

48.5 Grains IMR-3031 ( 3.7 Lee Dipper ) Max. Load

Winchester Large Rifle Magnum Primer

Remington Case

COAL- 3.094"

Velocity- 2, 958 fps.


Hornady 168 Grain A-MAX

50.3 Grains IMR 4350 (3.7 Lee Dipper) Max Load

Winchester Large Rifle Magnum Primer

Federal Case

COAL- 3.205"

Velocity- 2,492 fps.


SPEER 150 Grain RN

49.7 Grain IMR 4064 (3.7 Lee Dipper) Max. Load

Winchester Large Rifle Magnum Primer

Federal Case

COAL- 3.094"

Velocity- 2,688 fps.


January 15th 2011:
Picked up a box of Federal 180 Grain SP ammunition today.... I wanted to have another brand of factory to shoot through this rifle for a good comparison. I also want the Federal brass as it seems the best to use when reloading for this rifle.  I hope to get out and start shooting more the weather has kept me from getting to shoot this rifle to see how the replacement part is going to hold up.

January 16th 2011: Shot some of the Federal ammunition through the rifle, the rifle is functioning fine and appears that the gun is fixed.... so we are back on track with the actual shooting, and testing of the rifle.

January 25th 2011: This seems like a good base model rifle, but it does have some draw backs such as what happened with this rifle.... if you want a good rifle that will hold up to normal use without breaking the ban then this would be a good choice. I will probably hold on to the this rifle as a test gun for ammunition.

January 28th 2011: Received some Sierra bullets to use in this project, 150 Grain SP Pro- Hunter, 150 Grain Game Kings, 165 Grain Game Kings. I hope to get some loads worked up using these bullets in the next week or so. I have a group of loads to test already, and hope to get out and test them tomorrow. 

January 29th 2011: Shot the gun today to test the loads I had worked up, and to get accurate velocities on them. Rifle performed perfectly! No problems what so ever.... I have also been working up more loads for this rifle. They are listed below.......


180 Grain SPEER Round Nose

49.7 Grains IMR- 4064 (3.7 Lee Dipper ) Max. Load

Winchester Large Rifle Magnum Primer

Federal Case

COAL- Fit to chamber

Velocity- 2,924 fps.


150 Grain Hornady SP # 3031

47.3 Grains Winchester 748 (3.1 Lee Dipper) Max. Load

Winchester Large Rifle Magnum Primer

Remington Case

COAL- 3.250" My final measurement was 3.225.5

Velocity-  2,799 fps.


150 Grain SPEER Round Nose

47.3 Grains Winchester 748 (Lee Dipper 3.1) Max. Load

Winchester Large Rifle Magnum Primer

Remington Case

COAL- Fit to Chamber


Velocity- 2.698 fps.

NEW! 150 Grain Barnes MPG (Multi Purpose Green)

49.8 Grains A2520 (3.4 Lee Dipper)

GM210M Federal Match Primer

Federal Case

COAL- 3.272"

Velocity- 3.088 fps.


NEW! 165 Grain Barnes Tipped TSX

45.6 Grains IMR 4064( Lee Dipper 3.4)

GM210M Federal Match Primer

Federal Case

COAL- 3.199"

Velocity- 2,665.5 round up 2,666 fps.

Note: As with any load information please use caution and reduce load slightly to begin, and then work up to maximum loads. These results are with my rifle, and equipment. Use information at you own risk.

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