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Lazzeroni Caliber 6.17 (.243) Spitfire

 

  
A T T E N T I O N
  
Please do not be one of those hand loaders who is going to search through this information just to find the stated "MAXIMUM" load and start with that.
  
There is much more to determining your maximum load than just how much powder you can dump in the case.
  
Temperature, bullet type, bullet weight, bullet seating depth, barrel twist, grove diameter, chamber throat profile. These are just a few of the variables that can affect velocity and pressure.
  
In our never-ending search for high velocity, anyone can overload a cartridge to achieve "BRAGGING RIGHTS".
  
In doing so however, you risk damaging your rifle, endangering yourself and those around you.
  
The following information will assist you in working up an accurate, high velocity load for your rifle in a safe and prudent manner.
  
A good set of reloading dies, a quality set of calipers, an accurate powder scale and a reliable chronograph are some of the items you will need.
  
Begin by firing the first shot with the starting load and record seating depth and velocity.
  
Increase the powder charge no more than 1 grain at a time. If you experience ANY ONE of the following signs of pressure, reduce your powder charge by 10% and consider that your maximum load. Never exceed the maximum load stated in the following chart regardless of whether or not any pressure signs are apparent.

1. If you begin to see pressure signs on the primer such as flattening or "cratering" around the firing pin dent.
2. If enough brass flows into the ejector pin hole on the bolt face so as to cause a shiny spot or dent when the cartridge is ejected.
3. When ejecting the fired cartridge, the bolt is sticky or hard to lift.
  
  
Test Components
  
  Maximum Case Length 2.050"
  Trim-To Length 2.030"
  Primer Used FED 210
  Primer Size Large Rifle
  RCBS Shell Holder #4
  Jacketed Bullets Used Nosler Ballistic Tip 55GR, Nosler Ballistic Tip 70GR
 Nosler Partition 85GR, Nosler Partition 100GR
  
Test Specifications (Velocity and Pressure)
  
  Firearm Used: Pressure Test Rifle
  Barrel Length: 24"
  Twist: 10"
  Groove Diameter: .243"
 
   
55 Grain Nosler Ballistic Tip 2.680 O.A.L. @ 70F
POWDER
TYPE
SUGGESTED
STARTING GRAINS
ABSOLUTE MAXIMUM
LOAD IN GRAINS
VELOCITY
IN F.P.S.
PRESSURE
IN P.S.I.
Hodgdon
Varget
50GR 55GR 4206 65,700
Hodgdon
H4350 Extreme
55GR 60GR 4094 63,500
Alliant
Reloader 15
48GR 53GR 4186 64,200
Accurate Arms
4350
54GR 59GR 4132 64,300

  

70 Grain Nosler Ballistic Tip 2.680 O.A.L. @ 70F
POWDER
TYPE
SUGGESTED
STARTING GRAINS
ABSOLUTE MAXIMUM
LOAD IN GRAINS
VELOCITY
IN F.P.S.
PRESSURE
IN P.S.I.
Hodgdon
Varget
44GR 49GR 3806 65,800
Hodgdon
H4350 Extreme
51GR 56GR 3781 65,200
Alliant
Reloader 15
43GR 48GR 3735 63,200
Alliant
Reloader 19
55GR 59.5GR 3823 65,700
Accurate Arms
4350
50GR 55GR 3784 65,400

  

85 Grain Nosler Partition 2.680 O.A.L. @ 70F
POWDER
TYPE
SUGGESTED
STARTING GRAINS
ABSOLUTE MAXIMUM
LOAD IN GRAINS
VELOCITY
IN F.P.S.
PRESSURE
IN P.S.I.
Hodgdon
Varget
41GR 46GR 3460 65,800
Hodgdon
H4350 Extreme
49GR 54GR 3522 66,000
Alliant
Reloader 15
40GR 45GR 3438 65,200
Alliant
Reloader 19
51GR 56GR 3544 64,800
Accurate Arms
4350
48GR 53GR 3516 65,800

  

100 Grain Nosler Partition 2.680 O.A.L. @ 70F
POWDER
TYPE
SUGGESTED
STARTING GRAINS
ABSOLUTE MAXIMUM
LOAD IN GRAINS
VELOCITY
IN F.P.S.
PRESSURE
IN P.S.I.
Hodgdon
H4350 Extreme
46GR 51GR 3269 66,200
Accurate Arms
4350
45GR 50GR 3262 65,600
Alliant
Reloader 19
48GR 53GR 3298 65,300

  

Your rifle may have a different barrel length, groove diameter or twist rate than used for the rifles manufactured by Lazzeroni Arms Company.

Under no circumstances should you exceed the maximum powder charges stated in these specifications.

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