Well, as some of you know I got a pellet stuck in my 300 whisper barrel last year..
Ok, I solved the problem (it turns out that the scope is damaged somehow) and the gun goes back to shoot sub MOA around Easter this year (last month).
So, yesterday, it is the turn of the Whisper to see sunshine again..
I have definitely check and re check my reloads (to the extend of weighing the components before AND after loading for each cartridge)so that there is NO chance of high/low powder or no powder on the cartridge.
You know.. the once bitten etc etc sayings..
So I loads up the cartridges and looks forward to soaking up some sunshine after a week of rain..
Came Sunday, the day is well, not too cold, nor it is warm I think about 20 degree (celcius) or so in the range.
So I shoot my first round.. It feels ok, but through my scope, I cannot see the hole in the target!!
Checking the barrel, yup.. it is clear..
Hmm.. maybe it is me..
So I load the next round.. squeeze.. and blooompfh!
I GOT ANOTHER ROUND STUCK IN MY BARREL!!!!!!!!!
So what happened???
The cartridges brass, primer, projectile and powder were weighted BEFORE loading and the total is IDENTICAL with the weight of the assembly after they were put together..
The IDENTICAL load were used before and was a very consistent load.
A few variables I can think of, but they seem to be very trivial..
- I am on the bottom of my can of AR2205 powder.. maybe the last few loads left there.
- I am using new box of of primer CCI450.. but I bought them in 1000s batches
- I am using new box of Woodleigh projectile but they are usually very consistent.
- It was raining when I load the cartridges, but I am indoor away from the rain.
- the temperature of the day I last shoot the whisper successfully were about 25 - 26 degree with low humidity and the range is dry, where as yesterday, the range is wet from previous weeks rain.
- I lap my barrel after the last incident, but I shot the barrel after I lap and gets good result.
What did I miss???
Is AR-2205 temperature sensitive?
Could the batch of CCI-450 got swapped with CCI-400?
Could the projectile happened to be a tad fatter?
Could the first shot fouled the barrel enough to stop the second projectile?