NRA 1800 = 2 Gun?

So signing up for the VSRPA September 2700 and he options are Bullseye .22-Only in 2700/1800/900 or Bullseye Conventional Pistol in 2700/1800/900.

So, 2700 is easy 900 in .22, 900 in CF, 900 in .45.
What's a 1800 shot with? Any two or a specific two?
A 900? Any of the three?

Does the NRA track these scores/aggregates separately?

I've had a .45 on order for a while and put in the paperwork for the ATF import permit at the same time I paid for the pistol. So, if the stars align and the pistol and permit both arrive in time I wanted to shoot the 2700 Conventional Pistol just for the fun of it (out of practice with my .22, and bad enough with my 9mm, let alone a .45 I'll only just have acquired).

The organisers bent over backwards to help me out in the spring and lent me all the firearms I needed to shoot a .22 2700, DR, and Service Pistol. And they are essentially telling me they'll do the same this time round. Have to say I surprised the heck out of myself with an 80 in Timed Fire for the Service Pistol with a 1911. 

I have my permits for my .22, 9mm, and .38/.357 revolver. So I want to sign up for the .22 2700 on Saturday and Conventional 2700 on Sunday. So, I can shoot the 2700 with my own .45 if lucky or borrow a pistol if not. I But I would like to be more self-sufficient this time round and maybe get more practice and experience with my own pistols. So wondered about the 1800 option. Organisers say I should shoot the 2700 to get the scores and  classification.

Don't know about that event I'd have to see the program - it should be spelled out.

FYI
An 1800 could be either a 2 gun (22&CF) or a 3 gun (22,CF,45) event.  The 2 gun 1800 usually follows the 900 format, the 3 gun 1800 cuts out the National Match course and fires 2 SF, 2 Timed and 2 Rapid for a total of 600 per gun. 
- Dave

Course of fire is usually the same. You’ll probably just be shooting 2 of the 900’s (1800). I say usually and probably because it seems some local matches adjust the course of fire for time constraints or whatever the reason. I haven’t participated in any matches like that, but I’ve seen other post about it. 

What you shoot depends on which 900’s you participate in. My time is limited with work and family so some weekends I’ll show up early for just the .22 900, or I’ll shoot the .22 900 and CF 900 (1800) before I need to take off. I also have showed up later just for the .45 900 or CF and .45 900 (1800).

At our club we shoot 1800s. I think it’s “officially” 22 and CF, but most shoot 45s. We shoot 900 point courses for the two guns.

I would think the 1800 option simply means stop shooting after CF, in essence, two 900's. I have seen 1800 matches specifically run as 3 gun with no NMC in the middle.

So, 2700 is easy 900 in .22, 900 in CF, 900 in .45.
What's a 1800 shot with? Any two or a specific two?
A 900? Any of the three?

Does the NRA track these scores/aggregates separately?

 
Generally, the 900 / 1800 / 2700 designation is for which and how may of the Aggregate Matches you want to pay for and shoot.  Some people can only shoot 1 day or part of a multi day match. 

During the match, the .22 Aggregate will be shot with the .22, CF Aggregate with CF gun and the .45 Aggregate with a .45 according to the match schedule. You will need to conform with the caliber requirement for whichever Aggregates you are shooting (that relay) so there with be no confusion or problems with awards for that Aggregate unless the Tournament has some special conditions.  For example, shooting a .32 in the .45 aggregate would be unfair according to caliber and even if the the scores were put in the CF Match Aggregate, it might be a different day or different conditions, etc.  

.22 Tournament is a .22 only on any Aggregate since they are scored and awarded separately. Read the rules for .22 only Tournament. All scores are used for classification.  

All scores are sent in to the NRA as totals for that Tournament.  There is no separation by Match or Aggregate, all scores are combined and sent in as total for that Tournament and number of shots for that score.  For example if you shoot .22 and CF and have 850 and 800, the SR1 will show 1650 and 180 shots.  If you shoot CF and .45 Aggregates and .22 Team Match only and have 800 and 750 and 85, the SR-1 will show 1635 and 210 shots.  Basically, it will be total of whatever your score was (including any team scores) and the number of rounds fired for that score.  

Scores are separated by: Indoor, Outdoor, Open and Metallic.  However, with regards to the Open or Metallic Divisions, the highest Division fired in that Tournament will determine the Division for that total reported.  For example if you shoot Metallic in the .22 Aggregate and a dot sight in the CF Aggregate, the total scores and shots will be reported as Open Division since that was the highest Division used for that Tournament.  

All this is condensed, there are a number of other specific details.  Match program takes precedence. 

CR

CR,
Thanks for the very detailed response.
Instead of simply shooting and 1800 on the second day, I guess I really should just graciously accept the outstanding support that I'm being offered and use the .45 pistol and ammunition I'm being offered to shoot the conventional pistol 2700.
This will only be my second time travelling south of the border to shoot in competition and will be the first time I ever travel over the border with my own firearms. It'll be an interesting experience I'm sure.