Search found 22 matches

by dtdtdtdt
Tue Nov 07, 2017 2:20 pm
Forum: Shooters Lounge
Topic: Sighting in a new dot sight
Replies: 6
Views: 952

Re: Sighting in a new dot sight

Take a look at Opticsplanet. They have a huge variety of sights from very cheap to very expensive. I have used TASCO scopes for over 50 years with good success. Their open-style reflex didn't work out for me though. Bulky and sensitive to zero shifts as I note below. My suggestion: Avoid the open st...
by dtdtdtdt
Thu Nov 02, 2017 9:58 am
Forum: Shooters Lounge
Topic: Sighting in a new dot sight
Replies: 6
Views: 952

Re: Sighting in a new dot sight

You didn't say which kind of red dot. One based on a scope with windage and elevation as usual or one of the micro-reflection types such as the Burris Fastfire or similar. These are sometimes called holographic sights but aren't. Just to be confusing, the method of zeroing is to move the dot to the ...
by dtdtdtdt
Mon Oct 16, 2017 4:19 pm
Forum: Shooters Lounge
Topic: How often has your range been tested?
Replies: 12
Views: 2130

Re: How often has your range been tested?

I shoot at a 12 point indoor range with excellent ventilation so much so that air rifle shooting is difficult because of the draft. It was opened in 1990 and has been in continuous use since. That means DAILY shooting by about 100 active members. The range rules include wiping feet on a mat kept ins...
by dtdtdtdt
Sat Oct 07, 2017 7:59 pm
Forum: Shooters Lounge
Topic: Federal Gold Medal .22lr question
Replies: 6
Views: 1939

Re: Federal Gold Medal .22lr question

Just a couple weeks ago while playing with my antiques, I did a comparison test of 5 types of 22LR. I shot 5 ten shot groups with each at 50 yds with my 40x and 52c. The results are averages of those groups. Following that I shot a 20 shot group with each at 100yds. Not terribly scientific but met m...
by dtdtdtdt
Thu Oct 05, 2017 9:34 pm
Forum: Shooters Lounge
Topic: Talk about Antiques!!!
Replies: 5
Views: 1343

Re: Talk about Antiques!!!

thanks for the tip. I'll see what I see when I next get out the 40x. I had heard of the electrical connection system but have no idea how it was supposed to work or what it actually entailed. As noted, this 40x is from first year of production 1955-56 based on manufacturing code and serial number 19...
by dtdtdtdt
Thu Oct 05, 2017 8:18 am
Forum: Shooters Lounge
Topic: Talk about Antiques!!!
Replies: 5
Views: 1343

Re: Talk about Antiques!!!

I definitely exposed my ignorance of Remington 40x - 22 LR in my first note! This is the only one I have ever owned and I haven't looked at too many of them and certainly not in detail. It does shoot well though! I thought, assumed, or had been misinformed by someone that the 40x I had was a first g...
by dtdtdtdt
Wed Oct 04, 2017 2:35 pm
Forum: Shooters Lounge
Topic: Talk about Antiques!!!
Replies: 5
Views: 1343

Re: Talk about Antiques!!!

Just back from the range! I was able to get the Fecker scope correctly aligned and working great. Off a sandbag at 50 yds, Several many shot groups under 1" Most would have scored 10 or x on a regular target. Nothing fancy in ammunition too! CCI Std Velocity, some Norma TAC22 and a couple group...
by dtdtdtdt
Mon Oct 02, 2017 4:32 pm
Forum: Shooters Lounge
Topic: Talk about Antiques!!!
Replies: 5
Views: 1343

Talk about Antiques!!!

Just for fun, I thought I would tell you about this! I have a Win 52C with a CanJar trigger and Al Freeland 3-position stock and accessories that I bought in 1969. I am guessing that it was made in the 1950s or earlier since it came with a16x JW Fecker scope with a M K Lee 1/8' dot. The original cro...
by dtdtdtdt
Sun Oct 01, 2017 10:53 am
Forum: Shooters Lounge
Topic: Groups not reflecting sight picture
Replies: 8
Views: 1423

Re: Groups not reflecting sight picture

I see the same thing using Burris Fastfire red-dot type scopes on my pistols. I am not blessed with the problem of sub 1" groups the the author is because I just plain can't hold that still. However, holding the 3"black spot on a 50' target with my wobbles, I routinely can put all inside t...
by dtdtdtdt
Sat Sep 30, 2017 10:46 pm
Forum: Shooters Lounge
Topic: How do makers determine pellet weights?
Replies: 20
Views: 2512

Re: How do makers determine pellet weights?

John: Reading what you said more carefully and seeing the high powers of your air rifle, the tin pellets probably do well for a couple reasons. Your rifle power should upset pellet skirt and force the pellet to engage the rifling better than the lower power and smaller diameter of my .177 pellet. Wh...
by dtdtdtdt
Fri Sep 29, 2017 10:18 am
Forum: Shooters Lounge
Topic: How do makers determine pellet weights?
Replies: 20
Views: 2512

Re: How do makers determine pellet weights?

John D-B: "I doubt very much, after so many decades using lead slugs, that the makers give s**t about the weight of their lead slugs. Me thinks they just load a tin/box with a selected number, from 200 to 500 and weigh them and divided by the number of lead slugs within the container?????"...
by dtdtdtdt
Fri Sep 29, 2017 9:50 am
Forum: Shooters Lounge
Topic: How do makers determine pellet weights?
Replies: 20
Views: 2512

Re: How do makers determine pellet weights?

Some years ago I switched over to using 'TIN/STANNIC' type ammo and I purchased a small of type scale I bought of ebay. They say that the .22 weighs 14.5 grain and the scale showed that they were very, very close to being correct with each and every 'DYNAMIC' Tin ammo as I recorded them, one by one...
by dtdtdtdt
Fri Sep 29, 2017 9:36 am
Forum: Shooters Lounge
Topic: How do makers determine pellet weights?
Replies: 20
Views: 2512

Re: How do makers determine pellet weights?

Re: re: gravity.

We did the same experiment with a feather and a ball bearing in a glass tube that had been evacuated. I didn't see the moon drop experiment but certainly remember my physics classes.
by dtdtdtdt
Thu Sep 28, 2017 9:04 pm
Forum: Shooters Lounge
Topic: How do makers determine pellet weights?
Replies: 20
Views: 2512

Re: How do makers determine pellet weights?

To be precise, I said dies. I didn't imply or say that they were moulding them from liquid lead like a shooter would do at home. Wear, manufacturing variation, and processing speed have a lot to do with lot-to-lot variation. Every manufactured product has variation in their properties. Part of my di...
by dtdtdtdt
Wed Sep 27, 2017 6:27 pm
Forum: Shooters Lounge
Topic: How do makers determine pellet weights?
Replies: 20
Views: 2512

Re: How do makers determine pellet weights?

Regarding the velocity versus weight and drop. Granted these are thought experiments using a program and stretching it to ridiculous levels! It shows that if energy is held constant the POI is essentially identical for the range of pellet weights and velocities used. In this case, it computes to 16....
by dtdtdtdt
Wed Sep 27, 2017 4:30 pm
Forum: Shooters Lounge
Topic: How do makers determine pellet weights?
Replies: 20
Views: 2512

Re: How do makers determine pellet weights?

In the absence of measured experimental results, I resorted to Hawke ChairGun Pro for the calculated values. The calculated results show that the weight range of 10.2 to 10.5gr had no different drop. A velocity range of 840 to 880f/s had an increased drop of 0.05" for the higher velocities. You...
by dtdtdtdt
Wed Sep 27, 2017 2:00 pm
Forum: Shooters Lounge
Topic: How do makers determine pellet weights?
Replies: 20
Views: 2512

Re: How do makers determine pellet weights?

I don't disagree with the point you make and have seen it multiple times at longer distances. However, pellet velocity differences between 10.2 and 10.4gr are very small probably in the 5f/s difference range. The vertical stringing that I saw was about 1/4" at 50' and 860-65f/s. The stringing w...
by dtdtdtdt
Wed Sep 27, 2017 12:36 pm
Forum: Shooters Lounge
Topic: How do makers determine pellet weights?
Replies: 20
Views: 2512

Re: How do makers determine pellet weights?

Oh groan! Pellet weights and accuracy are linked very tightly and are very difficult to get right!!! PELLET WEIGHTS How do vendors give you a weight on the can? Count 500 pellets (or a thousand or 10,000) weight all at the same time on a hopefully accurate balance and divide by the number counted. A...
by dtdtdtdt
Thu Aug 31, 2017 3:32 pm
Forum: Shooters Lounge
Topic: Using the hand pump on a PCP pistol?
Replies: 15
Views: 1971

Re: Using the hand pump on a PCP pistol?

Re: the scuba tank method and moisture in the pistol.

Are you convinced that whoever fills the scuba tank dehydrates the air before hand?
by dtdtdtdt
Mon Aug 28, 2017 1:48 pm
Forum: Shooters Lounge
Topic: Flat tip 22 LR Ammunition versus round tip? Any evidence?
Replies: 6
Views: 1337

Re: Flat tip 22 LR Ammunition versus round tip? Any evidenc

Thanks for the input. I too think it is probably snake oil but since I have the time, I'll do the tests before I say that. It does seem odd that the flat point is preferred over a round point. To my way of thinking the flat tip may disrupt air flow a bit and make longer range accuracy a problem. As ...