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So the rainy, windy weather finally broke and I got my first chance to take my XL .270 out to the range for some load development. started with 140 ballistic tips and 4831sc; first groups with starting loads were nothing special but as I got closer to max they started to improve, still nothing special tho so i decided to switch to CCI magnum primers and got this beauty with 57.4 grains for 2955 fps average. group measures .340 center to center...off to the gun store to pick up some more ballistic tips for further tuning this afternoon. gun is straight out of the box except for fire lapping which by the way made it a breeze to clean also; 4 patches with bore tech, no brushing and i get a clean white patch on #5.

 

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K31Scout said:
Good rifle, good ammo and most of all good shooting! I love the Nosler BT's in .223

What is fire lapping?
Smooth the bore.
 

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I am a fan of CCI primers myself. I have found H4895 and Reloader15 great powders on the lightest varmint bullets
 

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K31Scout said:
I have used JB Bore Paste for lapping but whats the "fire" part of it. Are those those special bullets that lap the bore when fired?
I believe so, that it is where special coated bullets are shot through the barrel. I do the JB bore paste approach myself.
 

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Also one of the fastest ways to increase the throat by erosion.
Your shooting a bullet thats impregnated with an abrasive.
 

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Nice target.

The best firelapping is shooting the gun. I would never run those bullets thru a new barrel. If you have a pitted barrel or a sewer pipe on your gun, then they help with the fouling.
 
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