Thread: Sorting 22lr

I've been using CCI Target in my Annie 1415 M54 (4-12 x 44 set at 10x, bipod), as well as Eley Club.
I'd occasionally have a fail to extract (1-4 per 10/1 card) with the CCI - frustrating, as it ruins your rhythm - and your score.
With the Eley Club - maybe 1 per fortnight.
Shooting 2-3 cards a week.
I've had my best score (99.6) and my worst (89.0) with CCI.
Eley Club has been very consistent - the variation in scores is 98.3 - 94.2. Error is me - the shooter methinks.
Following this thread, I decided to take a random 20 live rounds from each type and cycle these through the the action.
As the Annie chamber is factory cut pretty tight, I was very gentle closing/opening the bolt.
I then compared rifling engagement on the leading edge of the projectile bearing surfaces between the two types.
Comparing two types side by side, I noticed that the CCI showed more rifling engagement on the round bearing surface, than the Eley.
The thing that really stood out for me was the CCI bearing surface was approx. 1mm longer than the Eley.
That is - the rifling marks were engaging more of the CCI projectile bearing surface length than on the Eley projectile.
The cases measured pretty much the same length.
I wonder if anyone else has noticed this before.
Also - thanks to some previous posters, I'll be taking more notice of how 'hard/easy' it is to close the bolt, when shooting a card.
I guess this will help with estimating whether a rim is thicker than some of its brethren, which I'm thinking is making extraction more difficult.
One of my thoughts here is that a thicker rim is not allowing the extractor claw to get over the rim positively and get a secure grip on the rim, making extraction a hit or miss event.
Any more experienced ideas would be appreciated.
My apologies for 'rambling' on so long.
Cheers.