Likely you have read around on Capital One and know by now that they do not seem to like all profiles and some people with low scores do well and those with high scores not so well. I would say a YMMV situation at best.
For myself, I had a Capital One Platinum MasterCard with a steps credit limit of $750 that never grew over eight years (too long). Needless to say, I recognized Cap1 for giving me a start and I closed their cards and moved on.
Also, there are so many great cards in the market place that can be had for one pull from one credit bureau why take three? Further, many lenders will actually entertain credit limit increases!
Really know you knew all this so I am only reinforcing your already acquired knowledge! 
@Anonymous wrote:
@Shooting-For-800 wrote:Buckets are real but they bucket the card not the client.
How does that work? I have a CapOne platinum with a CL of a bit over $100k.
The comment is intended to say Capital One could bucket the card, but they don't bucket the client. Not every card is bucketed (see earlier comments by others) and applying for a new card will result in a higher credit limit, which the OP could realize by taking the three HP.
I was bucketed with a legacy Capital One Platinum card at $10k and a fixed 10.90%APR 
They never gave me an increase after asking three times in 2015, so I applied for Venture, got $30k. 
Closed that after about two years, waited a year, applied for Savor and got $30k again in Dec 2018. Will keep the Savor for two years total, and see what shakes out later.
@NRB525 wrote:
@Anonymous wrote:
@Shooting-For-800 wrote:Buckets are real but they bucket the card not the client.
How does that work? I have a CapOne platinum with a CL of a bit over $100k.
The comment is intended to say Capital One could bucket the card, but they don't bucket the client. Not every card is bucketed (see earlier comments by others) and applying for a new card will result in a higher credit limit, which the OP could realize by taking the three HP.
I was bucketed with a legacy Capital One Platinum card at $10k and a fixed 10.90%APR
Thanks for clarifying that.
@FireMedic1 wrote:
@BrokenBones wrote:
@Shooting-For-800 wrote:Buckets are real but they bucket the card not the client.
Bucket the card and not the client? That's the first time I've ever heard anyone say that. What cards get bucketed?
Plat and QS1 is their bucket cards. But recently with Cap1. They like heavy spend and PIF for getting higher CLI's or any CLI's really. Been there done that and ended up with their top 3 @36k CL.
Plat and QS1 are the cards I got when I was still in the 500s with a $300 CL. Plat is now at $6000 and QS1 is at $7400.
I've never really had any issues with Cap1 since getting approved by them in early 2017. I know that the CLI stories that I've read on here worries me because I want my QS to grow a little more ($1500 CL since fall 2017). But despite that and their silly inability for us to PC cards to the Savor cards, I'm grateful that they approved me during a time that I was rebuilding. If it wasn't for Cap1 and Chase getting me approved when my scores were scratching at 600, I probably would have caved in with Credit One or Indigo. But even though I'll close my QS1 after Christmas once I try to get in with Amex next month (fingers crossed), I'm keeping my QS for as long as I can until I can get the Savor One and then go from there. So you should try another lender like Amex or Citi that will give you a much better chance to getting you appoved for the CLI that you need. Many folks on here seems to like Amex and their CLI, so that could be a good start.
