Good Budget Borescope?

I'm looking for recommendations for a good borescope under $100-200, opinions on rigid vs. flexible cables, brands to stay away from, and any other information that may help.

I have an old Enfield SMLE and no matter how much i brush the bore there is still some crap inside and i can't figure out what it is.
also the grooves/lands aren't very defined so I want to know if the bore is shot out, which would seem weird because I would think that it would be hard to shoot out the bore of an old milsurp bolt gun but maybe not.

anyways, I want to be able to see and diagnose bores so would appreciate some feedback on borescopes I should check out.

Usually some brisk shooting cleans most of the rubbish out.

Teslong borescopes
https://www.amazon.com/Teslong-Bores...b_title_sports
They have rigid and flexible models. I have the rigid one in my shop, and take the flexible one with me to gunshows...range, etc. I've had mine for a couple years. The price has gone up, but still a good deal.

Also...when you are done with whatever your cleaning product of choice is, try scrubbing with a patch and alcohol. Most oil based solvents, like good ole hoppes No. 9 leave a residue with trapped carbon etc which, no matter how many patches you run through, still gets picked up. I usually scrub with Hoppes no 9 and a bronze brush, patch out dry, then an alcohol patch. Next patch is usually sparkly white. Don't forget to oil well after using alcohol...WD-40, RIG, and cosmoline take the cake for rust prevention...don't bother with any fancy expensive stuff, see for yourself https://www.brownells.com/aspx/learn...aspx?lid=12616

A borescope is largely a waste of time and money. It merely enables you to see things that are of no consequence. The condition of a barrel can readily discerned with the naked eye by looking from both ends against good lighting (not dazzlingly bright). An SMLE barrel in good condition will have a bright bore with clearly defined sharp edges to the rifling, especially important at the muzzle end. Any evidence of rounded rifling, poor bore finish, or spots and pits near the muzzle means the barrel is useless for accurate shooting. It is important that the rifling is bright and sharp right to the muzzle. .303 (and other military calibre) barrels are easily 'shot out' due to improper cleaning, corrosive primers, shooting with dust in the muzzle, etc. The money involved in a borescope is better put towards a better barrel.